UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

REGION IX AIR DIVISION

Technical Support Document 

for

EPA’s Proposed Rulemaking

for the

Arizona State Implementation Plan:

New or Amended Rules from Arizona Administrative Code,

Title 18, Chapter 2, Articles 1, 2, 6, and 7

Prepared by: Christine Vineyard, Laura Yannayon, and Jeff Wehling

May 30, 2014
2

Submittal Dates: July 15, 1998 and July 28, 2011, as supplemented on May 16, 2014 and 

October 29, 2012, as supplemented on September 6, 2013

On July 15, 1998, ADEQ submitted an update to rules codified in Articles 6 (Emissions from 

Existing and New Nonpoint Sources), 7 (Existing Stationary Source Performance Standards), and 8 

[Emissions from Mobile Sources (New and Existing)] of Arizona Administrative Code (AAC), title 18 

(Environmental Quality), chapter 2 (Department of Environmental Quality Air Pollution Control). There 

were a total of 47 rules submitted on July 15, 1998. Of these, EPA has taken action on 10. In addition, 

EPA has taken action on four of the rules as later amended and re-submitted to EPA.

On July 28, 2011, ADEQ submitted an update to certain rules codified in Articles 1 through 7 and 

thereby superseded a further 18 rules submitted on July 15, 1998. The rules submitted on July 28, 2011

include generally-applicable rules and source-category-specific prohibitory and work practice rules, as 

well as certain rules that relate partially or entirely to the New Source Review (NSR) permitting 

program.1

A number of the rules submitted on July 28, 2011 were subsequently superseded by further 

amended rules submitted on October 29, 2012. The SIP submittal dated October 29, 2012 includes two 

statutory provisions and 40+ rules that represent an update to Arizona’s NSR permitting program. Some 

of the NSR provisions submitted on October 29, 2012 are solely permit-related while others are both 

permit-related but also more generally applicable for SIP purposes. On September 6, 2013, ADEQ 

submitted supplement information to the October 29, 2012 NSR SIP submittal including certified copies 

of the rules and statutes that were included in the original 2012 submittal.

Lastly, on March 16, 2014, ADEQ submitted a supplement to the July 15, 1998 and July 28, 2011 

submittals. ADEQ’s March 16, 2014 supplement included more recent codifications of some of the rules 

that had been submitted earlier and included an additional statutory provision (ARS 49-426) and certain 

additional rules (R18-2-204, R18-2-311, R18-2-312, appendix 9, and the Arizona Testing Manual) that 

had been referenced in previously-submitted rules but not originally included. ADEQ’s March 16, 2014 

supplement also withdrew two previously submitted rules (R18-2-609 and R18-2-709, which had been 

submitted on July 15, 1998) and requested rescission of R9-3-218 (“Violations”) and R9-3-509 

(“Standards of Performance for Existing Petroleum Refineries”) from the existing SIP.

This TSD covers (1) the remaining 13 rules submitted on July 15, 1998 on which EPA has not 

already taken action on (either directly or as amended) or that have not superseded or withdrawn; (2) 

the rules submitted on July 28, 2011 that were not superseded by the further amended versions of the 

same rules on October 29, 2012; (3) the rules submitted on October 29, 2012 that superseded the 

earlier-submitted rules; (4) and the other rules submitted on October 29, 2012 that are more generally 

applicable, including Article 1 (i.e., R18-2-101 et seq), Article 2, and Article 7 series rules. A separate TSD 

is being prepared for a separate rulemaking on the permitting-specific rules found in the Article 3, 

Article 4, and Article 5 series of rules (as well as a few permitting related definitions in R18-2-101 and 

two permitting-related Article 2 rules) submitted on July 28, 2011 and October 29, 2012. 

 

1

 The July 28, 2011 submittal included two versions of R18-2-703 and R18-2-715. EPA considers the earlier 

amended versions of the rules to be superseded by the latter amended versions of the rules, and is taking action 

only on the latter. 
3

The following table lists the statutes and rules submitted on July 15, 1998 and July 28, 2011, as 

supplemented on May 16, 2014, and October 29, 2012, as supplemented on September 6, 2013 and 

shows the allocation between this TSD (and related rulemaking) and the future NSR-permitting-related 

TSD (and related rulemaking). Submitted rules that have been superseded by subsequently submitted

rules are shown in strikethrough text.

Submittal Dated 

July 15, 1998, as 

supplemented on May 16, 

2014

Submittal 

Dated 

July 28, 2011, 

as 

supplemented 

on May 16, 

2014

Submittal 

Dated October 

29, 2012, as 

supplemented 

on September 

6, 2013

Addressed in 

this 

TSD and 

Related 

Rulemaking

Addressed in 

Separate 

PermittingRelated TSD 

and Related 

Rulemaking

ARS 49-402 ARS 49-402

ARS 49-426(A),

(B), (C), (E)(2), 

(F), (G), (H), (K), 

(L), (N), (O), 

and (P)

ARS 49-426(F) ARS 49-426(A), 

(B), (C), (E)(2), 

(G), (H), (K), (L), 

(N), (O), and (P)

ARS 49-426(F)

R18-2-101 R18-2-101 R18-2-101

(excluding

definitions (2), 

(20), (32), (87), 

(109), and (122)

R18-2-101 

(definitions (2), 

(20), (32), (87), 

(109), and 

(122)

R18-2-102 R18-2-102

R18-2-201 R18-2-201 R18-2-201

R18-2-202 R18-2-202 R18-2-202

R18-2-203 R18-2-203 R18-2-203

R18-2-204 R18-2-204

R18-2-205 R18-2-205

R18-2-206 R18-2-206

R18-2-210 R18-2-210 R18-2-210

R18-2-215 R18-2-215

R18-2-216 R18-2-216 R18-2-216

R18-2-217 R18-2-217

R18-2-218 R18-2-218

R9-3-218 

(delete without 

replacement)

R9-3-218 

(delete without 

replacement)

Appendix 2 Appendix 2

Appendix 10 

(delete without 

replacement)

Appendix 10 

(delete without 

replacement)

Arizona Testing 

Manual for Air 

Pollutant 

Emissions, 

Arizona Testing 

Manual for Air 

Pollutant 

Emissions, 
4

Revision F, 

March 1992, 

Sections 1 and 

7

Revision F, 

March 1992, 

Section 1; 

Section 7 

deferred

R18-2-301 R18-2-301

R18-2-302 R18-2-302

R18-2-302.01 R18-2-302.01

R18-2-303 R18-2-303

R18-2-304 R18-2-304

R18-2-306 R18-2-306

R18-2-306.01 R18-2-306.01

R18-2-306.02 R18-2-306.02

R18-2-310.01 R18-2-310.01

R18-2-311 R18-2-311

R18-2-312 R18-2-312

R18-2-315 R18-2-315

R18-2-316 R18-2-316

R9-3-319 

(delete w/out 

replacement)

R9-3-319 

(delete w/out 

replacement)

R9-3-322 

(delete w/out 

replacement)

R9-3-322 

(delete w/out 

replacement)

R18-2-319 R18-2-319

R18-2-320 R18-2-320

R18-2-321 R18-2-321

R18-2-323 R18-2-323 R18-2-323

R18-2-330 R18-2-330

R18-2-332 R18-2-332

Appendix 4 

(delete w/out 

replacement)

Appendix 4 

(delete w/out 

replacement)

Appendix 5 

(delete w/out 

replacement)

Appendix 5 

(delete w/out 

replacement)

R18-2-401 R18-2-401 R18-2-401

R18-2-402 R18-2-402

R18-2-403 R18-2-403

R18-2-404 R18-2-404

R18-2-405 R18-2-405

R18-2-406 R18-2-406

R18-2-407 R18-2-407

R18-2-409 R18-2-409

R18-2-412 R18-2-412

R18-2-502 R18-2-502
5

R18-2-503 R18-2-503

R18-2-504 R18-2-504

R18-2-505 R18-2-505

R18-2-509 R18-2-509

R18-2-512 R18-2-512

R18-2-513 R18-2-513

R18-2-601 R18-2-601

R18-2-602 – Approved as 

amended at 71 FR 28270 

(May 16, 2006)

R18-2-603 –Repealed; 

replaced by Article 15 

rules, which were approved 

at 71 FR 28270 (May 16, 

2006)

R18-2-604 R18-2-604

R18-2-605 R18-2-605

R18-2-606 R18-2-606

R18-2-607 R18-2-607

R18-2-608 R18-2-608 R18-2-608

R18-2-609 – withdrawn 

May 16, 2014

R18-2-610 – Re-codified as 

R18-2-614

R18-2-614

R18-2-701 – Approved at 

68 FR 14151 (March 24, 

2003)

R18-2-701 R18-2-701

R18-2-702 - Approved as 

amended at 69 FR 51952 

(August 24, 2004)

R18-2-703 R18-2-703 R18-2-703

R18-2-704 R18-2-704 R18-2-704

R18-2-705 Deferred

R18-2-706 R18-2-706

R18-2-707 R18-2-707

R18-2-708 R18-2-708 Deferred

R18-2-709 – withdrawn 

May 16, 2014

R9-3-509 

(delete without 

replacement)

R9-3-509 

(delete without 

replacement)

R18-2-710 – Approved at 

68 FR 14151 (March 24, 

2003)

R18-2-711 R18-2-711 Deferred

R18-2-712 R18-2-712 Deferred

R18-2-713 R18-2-713 Deferred

R18-2-714 R18-2-714
6

R18-2-715 – Subsections F, 

G, and H approved as 

amended at 69 FR 63321 

(November 1, 2004)

R18-2-715 R18-2-715 

Paragraphs (F) 

through (H); 

Defer 

paragraphs (A) 

through (E)

R18-2-715.01 - Approved 

as amended at 69 FR 63321 

(November 1, 2004)

R18-2-715.02– Approved at 

69 FR 63321 (November 1, 

2004)

R18-2-716 R18-2-716 Deferred

R18-2-717 R18-2-717 Deferred

R18-2-718 R18-2-718 

(repeal; i.e. R9-

3-518 (delete 

without 

replacement)

R18-2-718 

(repeal; i.e. R9-

3-518 (delete 

without 

replacement)

R18-2-719 R18-2-719 R18-2-719

R18-2-720 R18-2-720 R18-2-720

R18-2-721 R18-2-721 Deferred

R18-2-722 R18-2-722 Deferred

R18-2-723 R18-2-723

R18-2-724 R18-2-724 R18-2-724

R18-2-725– Approved at 68 

FR 14151 (March 24, 2003)

R18-2-726 R18-2-726

R18-2-727– Approved at 68 

FR 14151 (March 24, 2003)

R18-2-728 R18-2-728

R18-2-729 R18-2-729 R18-2-729

R18-2-730 R18-2-730 R18-2-730

R18-2-732 R18-2-732

R18-2-801– Approved at 68 

FR 14151 (March 24, 2003)

R18-2-802– Approved at 68 

FR 14151 (March 24, 2003)

R18-2-803– Approved at 68 

FR 14151 (March 24, 2003)

R18-2-804– Approved at 68 

FR 14151 (March 24, 2003)

R18-2-805– Approved at 68 

FR 14151 (March 24, 2003)

Appendix 9 Deferred
7

Appendix 11 

(delete w/out 

replacement)

Appendix 11 

(delete w/out 

replacement)

Submitted Statutes and Rules:

Arizona Revised Statutes, Title 49 (“The Environment”), Chapter 3 (“Air Quality”), Article 1 (“General 

Provisions”)

Section 49-402 (“State and County Control”)

Most recent amendments were promulgated by the Legislature in 2002. The Governor approved 

the amended statute on April 30, 2002. The October 29, 2012 SIP submittal states that ARS section 49-

402 is being submitted for approval into the SIP, but the statute was inadvertently omitted from the 

submittal package; however, ADEQ included ARS 49-402 to EPA in the supplemental SIP submittal dated

September 6, 2013. The existing version of ARS 49-402 (“State and County Control”) in the SIP was 

approved on June 8, 2000 (65 FR 36353).

Section 49-426 (“Permits; duties of director; exceptions; applications; objections; fees”)

Most recent amendments were promulgated by the Legislature in 1997. ARS section 49-426 was 

included in the May 16, 2014 supplement to the July 28, 2011 SIP submittal. ADEQ submitted only 

paragraphs (A), (B), (C), (E)(2), (F), (G), (H), (K), (L), (N), (O), and (P) for approval into the SIP. The 

excluded paragraphs are related to title V program requirements and need not be included in the SIP. 

The existing SIP version of this statute is ARS 36-1707.1 (“Permits; Exceptions; Applications; Fees”), 

which was approved on June 18, 1982 (47 FR 26382).

Arizona Administrative Code, Title 18 (“Environmental Quality”), Chapter 2 (“Department of 

Environmental Quality – Air Pollution Control”), Article 1 (“General”)

R18-2-101 (“Definitions”)

Most recent amendments became effective August 7, 2012; submitted on October 29, 2012.

Many of the definitions in R18-2-101 would be new to the SIP. The previously-approved definitions from 

R9-3-101 were submitted and approved on various dates and in various rulemakings. More specifically, 

most of the previously approved definitions included in R18-2-101 were most recently submitted on 

June 3, 1982 and approved into the SIP on September 28, 1982 (47 FR 42572) or May 3, 1983 (48 FR 

19878). One of the definitions submitted in R18-2-101 (“Act”) was most recently submitted on January 

4, 1979 and approved on May 5, 1982 (47 FR 19326). ”Stationary source” was most recently submitted 

on January 16, 2004 and approved on August 24, 2004 (69 FR 51952). A separate spreadsheet has been 

developed to show the sequence of approvals of R9-3-101 and the related supersession of definitions as 

approved into the Arizona SIP.

R18-2-102 (“Incorporated Materials”)

Most recent amendments became effective August 7, 2012; submitted on October 29, 2012.

The rule incorporates by reference sections 1 and 7 of the Department’s Arizona Testing Manual for Air 

Pollutant Emissions,” amended as of March 1992; ASTM test methods; and U.S. GPO’s “Standard 

Industrial Classification Manual, 1987.” There is no corresponding rule in the existing SIP; however, EPA

approved section 1 of the Arizona Testing Manual at 47 FR 17485 (April 23, 1982). 

Arizona Administrative Code, Title 18 (“Environmental Quality”), Chapter 2 (“Department of 

Environmental Quality – Air Pollution Control”), Article 2 (“Ambient Air Quality Standards; Area 

Designations; Classifications”)
8

R18-2-201 (“Particulate Matter: PM10 and PM2.5”)

Most recent amendments became effective August 7, 2012; submitted October 29, 2012. The 

rule, as amended, updates the particulate matter ambient air quality standards to reflect EPA 

regulations at 40 CFR 50.6 and 50.13. The corresponding provision in the existing SIP is R9-3-201

(“Particulate Matter), approved on October 19, 1984 (49 FR 41026).

R18-2-202 (“Sulfur Oxides (Sulfur Dioxide)”)

Most recent amendments became effective August 7, 2012; submitted October 29, 2012. The 

rule, as amended, updates the SO2 ambient air quality standards to reflect EPA regulations at 40 CFR 

50.5 and 50.17. The amended rule also provides for the revocation of the annual and 24-hour primary 

SO2 standards. The corresponding provision in the existing SIP is R9-3-202 (“Sulfur Oxide (Sulfur 

Dioxide)”), approved on October 19, 1984 (49 FR 41026).

R18-2-203 (“Ozone: One-hour Standard and Eight-hour Average Standard”)

Most recent amendments became effective August 7, 2012; submitted October 29, 2012. The 

rule, as amended, updates the ozone ambient air quality standards to reflect EPA regulations at 40 CFR 

50.15. The existing provision in the existing SIP is R9-3-204 (“Ozone”), approved on October 19, 1984 (49 

FR 41026).

R18-2-204 (“Carbon monoxide”)

Most recent amendments became effective September 26, 1990; included in the May 16, 2014 

supplement to the SIP revision submittal dated July 28, 2011. The rule, as amended, updates the carbon 

monoxide standards to reflect EPA regulations at 40 CFR 50.8(c) and (d). The existing provision in the 

existing SIP is R9-3-205 (“Carbon monoxide”), approved on October 19, 1984 (49 FR 41026).

R18-2-205 (“Nitrogen Oxides (Nitrogen Dioxide)”)

Most recent amendments became effective August 7, 2012; submitted October 29, 2012. The 

rule, as amended, updates the NO2 ambient air quality standards to reflect EPA regulations at 40 CFR 

50.11. The corresponding provision in the existing SIP is R9-3-206 (“Nitrogen Dioxide”), approved on 

October 19, 1984 (49 FR 41026).

R18-2-206 (“Lead”)

Most recent amendments became effective August 7, 2012; submitted October 29, 2012. The 

rule, as amended, updates the lead ambient air quality standards to reflect EPA regulations at 40 CFR 

50.16 and provides for the revocation of the original lead ambient air quality standard set forth at 40 

CFR 50.12. The corresponding provision in the existing SIP is R9-3-207 (“Lead”), approved on October 19, 

1984 (49 FR 41026).

R18-2-210 (“Attainment, Nonattainment, and Unclassifiable Area Designations”)

Most recent amendments became effective August 7, 2012; submitted October 29, 2012. This 

rule incorporates by reference EPA’s area designations for Arizona in 40 CFR 81.303 as of July 1, 2011. 

There is no corresponding provision in the existing SIP.

R18-2-215 (“Ambient air quality monitoring methods and procedures”)

Most recent amendments became effective September 26, 1990; submitted on October 29, 

2012. This rule establishes generally applicable requirements with respect to methods and procedures 

for monitoring ambient air quality. The amended rule refers to 40 CFR part 58 rather than the Arizona 

Testing Manual for applicable quality assurance, monitor siting, and sample probe installation 
9

procedures. The corresponding provision in the existing SIP is R9-3-215 (“Ambient air quality monitoring 

methods and procedures”), approved on October 19, 1984 (49 FR 41026).

R18-2-216 (“Interpretation of Ambient Air Quality Standards”)

Most recent amendments became effective March 7, 2009; submitted on July 28, 2011. 

The amended rule is essentially the same as the existing SIP rule, which is R9-3-216 (“Interpretation of 

Ambient Air Quality Standards and Evaluation of Air Quality Data”), paragraph (A), approved on April 23, 

1982, 47 FR 17483. 

R9-3-218 (“Violations”)(Rescission)

ADEQ requested rescission of this rule from the SIP in the May 16, 2014 supplement to the July 

28, 2011 SIP submittal. ADEQ repealed the newer version of the rule, R18-2-219 (“Violations”), effective 

for State law purposes on August 7, 2012. We last approved R9-3-218 on October 19, 1984, 49 FR 41026.

Appendix 2 (“Test Methods and Protocols”)

Most recent amendments became effective October 3, 2005; submitted on July 28, 2011.

Appendix 2 would be new to the SIP.

Appendix 10 (“Evaluation of Air Quality Data”)(Rescission)

ADEQ requested rescission of this rule from the SIP in the July 28, 2011 SIP submittal. ADEQ 

repealed appendix 10, effective for State law purposes on March 7, 2009. Existing SIP appendix 10 

includes paragraphs submitted on January 4, 1979, July 17, 1980, and July 13, 1981 that were approved 

on April 23, 1982 at 47 FR 17483.

Arizona Testing Manual for Air Pollutant Emissions

R18-2-101(17) defines “Arizona Testing Manual” to include only sections 1 and 7, and ADEQ 

included sections 1 and 7 of the Arizona Testing Manual (Revision F, March 1992) in the May 16, 2014 

supplement to the July 28, 2011 SIP submittal. A previous version of section 1 was approved into the SIP; 

section 7 would be new. Also included in the SIP are various EPA test methods and performance 

specifications from 40 CFR part 60, appendices A and B. Based on EPA’s action at 47 FR 17485 (April 23, 

1982), the approved version of the Arizona Testing Manual includes only three sections: section 1.0 

(“Arizona Source Test Policy”), 1.1 Source Test Qualification, 1.2 Source Test Planning and Approval, 1.3 

Quality Assurance Provisions, and 1.4 Data Collection and Evaluation; section 3 = 40 CFR part 60, 

appendix A, methods 1 through 17, 19, and 20; and section 4, 40 CFR part 60, appendix B, performance 

specifications 1, 2, and 3.

Arizona Administrative Code, Title 18 (“Environmental Quality”), Chapter 2 (“Department of 

Environmental Quality – Air Pollution Control”), Article 6 (“Emissions from Existing and New Nonpoint 

Sources”)

R18-2-601 (“General”)

The most recent amendments became effective November 15, 1993; submitted on July 15, 

1998, and then re-submitted as currently codified on May 16, 2014. The rule was renumbered and 

updated to reflect the recodification of article 4 as article 6. It contains an obsolete reference to AAC 

title 9, chapter 3, article 8, which is now codified at AAC title 18, chapter 2, article 9. The corresponding 

rule in the existing SIP is R9-3-401 (“General”), approved on April 23, 1982 (47 FR 17483).

R18-2-604 (“Open areas, dry washes or riverbeds”)
10

The most recent amendments became effective November 15, 1993; submitted on July 15, 

1998, and then re-submitted as currently codified on May 16, 2014. The rule was renumbered and a 

statutory reference was updated. The corresponding rule in the existing SIP is R9-3-404 (“Open areas, 

dry washes or riverbeds”), approved on October 19, 1984 (49 FR 141026).

R18-2-605 (“Roadways and streets”)

The most recent amendments became effective November 15, 1993; submitted on July 15, 

1998, and then re-submitted as currently codified on May 16, 2014. The corresponding rule in the 

existing SIP is R9-3-405 (“Roadways and streets”), approved on April 23, 1982 (47 FR 17483).

R18-2-606 (“Material handling”)

The most recent amendments became effective November 15, 1993; submitted on July 15, 

1998, and then re-submitted as currently codified on May 16, 2014. The corresponding rule in the 

existing SIP is R9-3-406 (“Material handling”), approved on April 23, 1982 (47 FR 17483).

R18-2-607 (“Storage piles”)

The most recent amendments became effective November 15, 1993; submitted on July 15, 

1998, and then re-submitted as currently codified on May 16, 2014. The corresponding rule in the 

existing SIP is R9-3-407 (“Storage piles”), approved on April 23, 1982 (47 FR 17483).

R18-2-608 (“Mineral Tailings”)

The most recent amendments became effective March 7, 2009; submitted on July 28, 2011. The 

rule was amended to include the language “or own or otherwise operate” to clarify that pollution 

control measures should continue after the construction of mineral tailings piles and for times when 

tailings piles are inactive. The corresponding rule in the existing SIP is R9-3-408 (“Mineral Tailings”), 

approved on April 23, 1982 (47 FR 17483). 

R18-2-614 (“Evaluation of nonpoint source emissions”)

The most recent amendments were included in ADEQ’s May 16, 2014 supplement and became 

effective August 7, 2012. The rule was renumbered and revised to include updated references to other 

rules. The corresponding rule in the existing SIP is R9-3-410 (“Evaluation of nonpoint source emissions”), 

approved on April 23, 1982 (47 FR 17483).

Arizona Administrative Code, Title 18 (“Environmental Quality”), Chapter 2 (“Department of 

Environmental Quality – Air Pollution Control”), Article 7 (“Existing Stationary Source Performance 

Standards”)2

R18-2-701 Definitions Amended Eff. August 7, 2012

R18-2-703 Standards of Performance for Existing Fossil- Amended Eff. March 7, 2009

fuel Fired Steam Generators and General Fuelburning Equipment

R18-2-704 Standards of Performance for Incinerators Amended Eff. August 4, 2007

R18-2-705 Standards of Performance for Existing Portland Amended Eff. Nov. 15, 1993

Cement Plants

R18-2-706 Standards of Performance for Existing Nitric Acid Amended Eff. Nov. 15, 1993

 

2 All of the article 7 rules evaluated herein were submitted on July 28, 2011, except for R18-2-701, which was 

submitted on October 29, 2012, and R18-2-705, R18-2-706, R18-2-707, R18-2-709, R18-2-714, R18-2-723, R18-2-

726, and R18-2-728, where were submitted on July 15, 1998.
11

Plants

R18-2-707 Standards of Performance for Existing Sulfuric Acid Amended Eff. Nov. 15, 1993

Plants

R18-2-708 Standards of Performance for Existing Asphalt Amended Eff. March 7, 2009

Concrete Plants

R18-2-711 Standards of Performance for Existing Secondary Amended Eff. March 7, 2009

Lead Smelters

R18-2-712 Standards of Performance for Existing Secondary Amended Eff. March 7, 2009

Brass and Bronze Ingot Production Plants

R18-2-713 Standards of Performance for Existing Iron and Amended Eff. March 7, 2009

Steel Plants

R18-2-714 Standards of Performance for Existing Sewage Amended Eff. Nov. 15, 1993

Treatment Plants

R18-2-715 Standards of Performance for Existing Primary Amended Eff. March 7, 2009

Copper Smelters; Site-specific Requirements

R18-2-716 Standard of Performance for Existing Coal Amended Eff. March 7, 2009

Preparation Plants

R18-2-717 Standards of Performance for Steel Plants: Existing Amended Eff. March 7, 2009

Electric Arc Furnaces (EAF)

R18-2-718 Standards of Performance for Existing Kraft Pulp Mills Repealed Eff. August 4, 2007

R18-2-719 Standards of Performance for Existing Stationary Amended Eff. March 7, 2009

Rotating Machinery

R18-2-720 Standards of Performances for Existing Lime Amended Eff. March 7, 2009

Manufacturing Plants

R18-2-721 Standards of Performance for Existing Nonferrous Amended Eff. March 7, 2009

Metals Industry Sources

R18-2-722 Standards of Performance for Existing Gravel or Amended Eff. March 7, 2009

Crushed Stone Processing Plants

R18-2-723 Standards of Performance for Existing Concrete Amended Eff. Nov. 15, 1993

Batch Plants

R18-2-724 Standards of Performance for Fossil-fuel Fired Amended Eff. March 7, 2009

Industrial and Commercial Equipment

R18-2-726 Standards of Performance for Sandblasting Amended Eff. Nov. 15, 1993

Operations

R18-2-728 Standards of Performance for Existing Ammonium Amended Eff. Nov. 15, 1993

Sulfide Manufacturing Plants

R18-2-729 Standards of Performance for Cotton Gins Amended Eff. August 4, 2007

R18-2-730 Standards of Performance for Unclassified Sources Amended Eff. March 7, 2009

R18-2-732 Standards of Performance for Existing Hospital/ Amended Eff. August 4, 2007

Medical/Infectious Waste Incinerators

Appendix 11 Allowable Particulate Emissions Computations Repealed Eff. March 7, 2009

SIP-Approved Rules

Existing SIP Rule Title Submittal/Approval History

R9-3-101 Definitions Many of the definitions in R18-

2-701 would be new to the SIP; 

others were previously 
12

approved as definitions in R9-3-

101. The previously-approved 

definitions from R9-3-101 were 

submitted and approved on 

various dates and in various 

rulemakings. More specifically, 

most of the previously approved 

definitions included in R18-2-

701 were most recently 

submitted on June 3, 1982 and 

approved into the SIP on 

September 28, 1982 (47 FR 

42572) or May 3, 1983 (48 FR 

19878). ”Existing source” was 

most recently submitted on 

January 16, 2004 and approved 

on August 24, 2004 (69 FR 

51952).

R9-3-502 Unclassified Sources Existing version of SIP rule 

contains various paragraphs 

that were submitted by ADEQ 

on January 4, 1979; April 1, 

1980; July 17, 1980; and 

February 3, 1984; certain 

paragraphs were approved by 

EPA on April 23, 1982 at 47 FR 

17483, certain other paragraphs 

were approved on October 19, 

1984 at 49 FR 41026.

R9-3-503 Standards of Performance for Existing Fossilfuel Fired Steam Generators and General Fuel 

Burning Equipment

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979; April 1, 1980; July 17, 

1980; and July 13, 1981; and 

approved by EPA on April 23, 

1982 at 47 FR 17483.

R9-3-504 Standards of Performance for Incineration Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979; April 1, 1980; and July 

17, 1980; and approved by EPA 

on April 23, 1982 at 47 FR 

17483.

R9-3-505 Standards of Performance for Existing 

Portland Cement Plants

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979; July 17, 1980; and June

3, 1982; and approved by EPA 
13

on April 23, 1982 at 47 FR 

17483, and September 28, 1982 

at 47 FR 42572.

R9-3-506 Standards of Performance for Existing Nitric 

Acid Plants

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979; July 17, 1980; and July

13, 1981; and approved by EPA 

on April 23, 1982 at 47 FR 

17483.

R9-3-507 Standards of Performance for Existing Sulfuric 

Acid Plants

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979 and July 17, 1980; and 

approved by EPA on April 23, 

1982 at 47 FR 17483.

R9-3-508 Standards of Performance for Existing Asphalt 

Concrete Plants

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979; April 1, 1980; and June 

3, 1982; certain paragraphs 

were approved by EPA on April 

23, 1982 at 47 FR 17483, and 

Paragraphs B to B.1, B.2, and B.5 

were approved on September 

28, 1982 at 47 FR 42572.

R9-3-509 Standards of Performance for Existing 

Petroleum Refineries

Existing version of SIP rule 

contains was submitted on July 

17, 1980; and approved by EPA 

on April 23, 1982 at 47 FR 

17483.

R9-3-511 Standards of Performance for Existing 

Secondary Lead Smelters

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979; April 1, 1980; and June 

3, 1982; certain paragraphs 

were approved by EPA on April 

23, 1982 at 47 FR 17483, and 

Paragraphs A to A.1, and A.2 

were approved on September 

28, 1982 at 47 FR 42572.

R9-3-512 Standards of Performance for Existing 

Secondary Brass and Bronze Ingot Production 

Plants

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979; April 1, 1980; and July 

17, 1980; and approved by EPA 

on April 23, 1982 at 47 FR 

17483.
14

R9-3-513 Standards of Performance for Existing Iron 

and Steel Plants

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979; April 1, 1980; and June 

3, 1982; certain paragraphs 

were approved by EPA on April 

23, 1982 at 47 FR 17483, and 

Paragraphs A to A.1, and A.2 

were approved on September 

28, 1982 at 47 FR 42572.

R9-3-514 Standards of Performance for Existing Sewage 

Treatment Plants

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979; April 1, 1980, and July 

17, 1980; and approved by EPA 

on April 23, 1982 at 47 FR 

17483.

R18-2-715 Standards of Performance for Existing Primary 

Copper Smelters; Site-Specific Requirements

Existing version of the SIP 

contains paragraphs F, G, and H 

and was submitted by ADEQ on 

September 12, 2003 and 

approved by EPA on November 

1, 2004 at 69 FR 63321. As to 

R18-2-715, paragraphs A 

through E, the corresponding 

provisions in the existing 

applicable SIP include SIP rule 7-

1-3.6 (for copper smelters 

outside of Gila, Maricopa, Pima, 

Pinal and Santa Cruz counties) 

and FIP rule at 40 CFR 

52.126(b)(for copper smelters 

within those counties).

R9-3-516 Standards of Performance for Existing Coal 

Preparation Plants

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979; April 1, 1980; and June 

3, 1982; certain paragraphs 

were approved by EPA on April 

23, 1982 at 47 FR 17483, and 

Paragraphs A to A.1, and A.2 

were approved on September 

28, 1982 at 47 FR 42572.

R9-3-517 Standards of Performance for Steel Plants: 

Existing Electric Arc Furnaces (EAF)

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979; April 1, 1980; and June 

3, 1982; certain paragraphs 
15

were approved by EPA on April 

23, 1982 at 47 FR 17483, and 

Paragraphs A to A.1 were 

approved on September 28, 

1982 at 47 FR 42572.

R9-3-518 Standards of Performance for Existing Kraft 

Pulp Mills

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979; April 1, 1980; and June 

3, 1982; certain paragraphs 

were approved by EPA on April 

23, 1982 at 47 FR 17483, and 

Paragraphs A to A.1, and A.2 

were approved on September 

28, 1982 at 47 FR 42572.

R9-3-519 Standards of Performance for Existing 

Stationary Rotating Machinery

Existing version of SIP rule 

contains various paragraphs

that were submitted by ADEQ 

on January 4, 1979 and July 17, 

1980 and approved by EPA on 

April 23, 1982 at 47 FR 17483.

R9-3-520 Standards of Performance for Existing Lime 

Manufacturing Plants

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979; April 1, 1980; and June 

3, 1982; certain paragraphs 

were approved by EPA on April 

23, 1982 at 47 FR 17483, and 

Paragraphs A to A.1, and A.2 

were approved on September 

28, 1982 at 47 FR 42572.

R9-3-521 Standards of Performance for Existing 

Nonferrous Metals Industry Sources

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979; April 1, 1980; and June 

3, 1982; certain paragraphs 

were approved by EPA on April 

23, 1982 at 47 FR 17483, and 

Paragraphs A to A.1, and A.2 

were approved on September 

28, 1982 at 47 FR 42572.

R9-3-522 Standards of Performance for Existing Gravel 

or Crushed Stone Processing Plants

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979 and June 3, 1982; 

certain paragraphs were 

approved by EPA on April 23, 

1982 at 47 FR 17483, and 
16

Paragraphs A to A.1, and A.2 

were approved on September 

28, 1982 at 47 FR 42572.

R9-3-523 Standards of Performance for Existing 

Concrete Batch Plants

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979 and July 17, 1980; and 

approved by EPA on April 23, 

1982 at 47 FR 17483.

R9-3-524 Standards of Performance for Existing FossilFuel Fired Industrial and Commercial 

Equipment

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979 (C, D.1, D.2, D.4 to G.5) 

and July 17, 1980 (A, B, D and 

D.3) by ADEQ and that were 

approved by EPA on April 23, 

1982 at 47 FR 17483.

R9-3-526 Sandblasting Operations Existing version of SIP rule was 

submitted on January 4, 1979;

and approved by EPA on April 

23, 1982 at 47 FR 17483.

R9-3-528 Standards of Performance for Existing 

Ammonium Sulfide Manufacturing Plants

Existing version of SIP rule 

contains various paragraphs 

that were submitted on January 

4, 1979 and July 17, 1980; and 

approved by EPA on April 23, 

1982 at 47 FR 17483.

R9-3-529 Standards of Performance for Cotton Gins Existing version of SIP rule was 

submitted by ADEQ on February 

3, 1984 and approved by EPA on 

October 19, 1984 at 49 FR 

41026.

R18-2-732 See regulatory history for R9-3-504. Hospital 

incinerators were formerly regulated under 

R9-3-504 (re-numbered R18-2-704), but are 

now regulated separately under R18-2-732.

Appendix 11 Allowable Particulate Emissions 

Computations

Submitted on February 3, 1984; 

Approved on October 19, 1984, 

49 FR 41026; corrected on 

January 16, 2004, 69 FR 2509.

Rule Revisions and Evaluation

Section 110(a) of the Clean Air Act (CAA or “Act”) requires states to submit state 

implementation plans (SIPs) to provide for the implementation, maintenance, and enforcement of the 

national ambient air quality standards (NAAQS), including those for particulate matter (PM-10 and 

PM2.5), ozone, carbon monoxide, sulfur dioxide, nitrogen dioxide and lead. EPA promulgates the NAAQS 
17

to protect public health and safety. SIPs must contain, among other elements, enforceable emission 

limitations and other control measures, means, or techniques as may be necessary or appropriate to 

meet SIP requirements. SIPs must also include programs to provide for the regulation of the 

modification and construction of any stationary source to assure that the NAAQS are achieved, including 

permit programs to meet the additional requirements in areas where the NAAQS are being violated and 

to prevent significant deterioration in areas where the NAAQS are being achieved. 

Generally, the submitted statutes, rules, and rule rescissions represent revisions (or rescissions) 

to statutes and rules previously approved by EPA into the Arizona SIP. We have evaluated the submitted 

provisions for compliance with currently-applicable SIP requirements (which might have changed 

relative to when the rules were originally approved into the SIP), and to determine whether the

revisions (or rescissions) would interfere with any applicable requirements concerning attainment and 

reasonable further progress (RFP) or any other applicable requirement of the Act under CAA section 

110(l)) or are otherwise precluded from approval under CAA section 193. 

Section 110(l) provides in relevant part: “[EPA] shall not approve a revision of a [SIP] if the 

revision would interfere with any applicable requirement concerning attainment and reasonable further 

progress (as defined in [CAA section 171]), or any other applicable requirement [of the CAA].” Section 

193 provides in relevant part: “No control requirement in effect ... in any area which is a nonattainment 

area for any air pollutant may be modified after November 15, 1990, in any manner unless the 

modification insures equivalent or greater emission reductions of such air pollutant.” 

Arizona Revised Statutes, Title 49 (“The Environment”), Chapter 3 (“Air Quality”), Article 1 (“General 

Provisions”)

49-402 (“State and county control”)

ADEQ’s October 29, 2012 SIP submittal indicated that this statute, as amended, was being 

submitted for approval, but it was inadvertently omitted from the SIP submittal package. However, 

ADEQ did submit ARS 49-402 to EPA in a supplemental SIP submittal dated September 6, 2013. Relative 

to the version approved into the SIP, section 49-402 (as submitted in 2013) was amended by the Arizona 

Legislature in 2002 to extend permitting authority by ADEQ over title V sources in any county for which 

EPA has disapproved the title V permit program if EPA has approved ADEQ’s program. So long as title V 

sources are being administered under an EPA-approved program, it does not matter whether that 

program is State-run or county-run; thus, this change is acceptable. Recommend approval.

Section 49-426 (“Permits; duties of director; exceptions; applications; objections; fees”)

As noted above, this statute was included in ADEQ’s May 16, 2014 supplement to the July 28, 

2011 SIP submittal. ADEQ submitted only paragraphs (A), (B), (C), (E)(2), (F), (G), (H), (K), (L), (N), (O), 

and (P) for approval into the SIP. The excluded paragraphs are related to title V program requirements 

and need not be included in the SIP. Paragraph (F) provides that permits shall be issued for a period of 

five years. The statute differs from the existing SIP version of this statute [ARS 36-1707.1 (“Permits; 

Exceptions; Applications; Fees”)] in that it provides for the issuance of general permits. Recommend 

approval but refer paragraph (F) to the NSR-related rulemaking.

Arizona Administrative Code, Title 18 (“Environmental Quality”), Chapter 2 (“Department of 

Environmental Quality – Air Pollution Control”), Article 1 (“General”)

R18-2-101 (“Definitions”)

The following table provides an evaluation and recommendation for each defined term included 

in R18-2-101, as submitted on October 29, 2012, with the exception of the following definitions that will 

be considered in the NSR-related rulemaking: 2. Actual emissions; 20. Begin actual construction; 32. 

Construction; 87. Net emissions increase; 109. Potential to emit; and 122. Regulated NSR pollutant.
18

Paragraph 

#

Defined Term: Evaluation Recommendation

1 Act Same as existing SIP definition but 

amended to exclude CAA Amendments 

after December 31, 2011. Acceptable.

Approve

2 Actual 

emissions

Will be evaluated in a separate rulemaking.

3 Administrator Same as existing SIP definition. Acceptable. Approve

4 Affected facility Same as existing SIP definition. Same as 

definition in 40 CFR 60.2. Acceptable.

Approve

5 Affected source New to SIP. Patterned after definition in 

CAA section 402(2). Acceptable.

Approve

6 Affected state New to SIP. Patterned after definition in 40 

CFR 70.2. Acceptable.

Approve

7 Afterburner Same as existing SIP. Included as 

subparagraph (e) within definition of 

“incinerator” at R9-3-101(81). Acceptable.

Approve

8 Air 

contaminants

Same as existing SIP definition in R9-3-102

as submitted on September 16, 1975 and 

approved at 43 FR 33245 (July 31, 1978). 

Also same as ARS 49-421(1), approved at 

77 FR 66398 (November 5, 2012). 

Acceptable.

Approve

9 Air curtain 

destructor

Same as existing SIP. Included as 

subparagraph (d) within definition of 

“incinerator” at R9-3-101(81). Acceptable.

Approve

10 Air pollution Same as existing SIP definition in R9-3-102 

as submitted on September 16, 1975 and 

approved at 43 FR 33245 (July 31, 1978). 

Also same as ARS 49-421(2), approved at 

77 FR 66398 (November 5, 2012). 

Acceptable.

Approve

11 Air pollution 

control 

equipment

Same as existing SIP. Acceptable. Approve

12 Air quality 

control region

Same as existing SIP with the exception 

that the listing for the Mohave-Yuma 

Intrastate AQCR has been updated to 

reflect the separation of the northern 

portion of Yuma County in 1983 and 

establishment of La Paz County.

Acceptable.

Approve

13 Allowable 

emissions

Same as existing SIP but amended for 

purposes of clarification and updated. 

Acceptable.

Approve

14 Ambient air Same as existing SIP. Acceptable Approve
19

15 Applicable 

implementation 

plan

New to SIP. Consistent with 40 CFR 52.02(a) 

and (b).

Approve

16 Applicable 

requirement

New to SIP. Relies on term “federal 

applicable requirement” (see notes below 

as to that term). Acceptable or 

unacceptable to the extent that “federal 

applicable requirement” is acceptable or 

unacceptable.

See notes on “federal 

applicable requirement”

17 Arizona Testing 

Manual

Similar to existing SIP but amended to refer 

specifically to section 1 and 7 of the manual 

and limited to amendments of the manual 

through March 1992. EPA last approved 

section 1 of the Arizona Testing Manual on 

47 FR 17485 (April 23, 1982). Section 7 

would be new to the SIP and is only relied 

on in R18-2-715. Acceptable.

Approve. 

18 ASTM Similar to existing SIP. Acceptable. Approve

19 Attainment 

area

The definition of this term has been revised 

to no longer refer to designations under 

CAA section 107 but rather to refer to areas 

that have been identified in regulation 

promulgated by EPA as being in compliance 

with national ambient air quality standards. 

This change may be problematic depending 

on how the term is relied upon in the 

substantive rule(s). For example, for PSD, 

attainment area should refer to areas 

designated or redesignated as attainment 

under section 107(d). Areas for which EPA 

has made determinations of attainment, 

but has not yet redesignated, remain 

designated nonattainment and should 

continue to be subject to Nonattainment 

NSR provisions, not PSD.

ADEQ indicates that, 

while the reason for the 

revision is unknown, the 

revision in the definition 

does not affect any 

substantive requirement, 

such as applicability 

determinations, because 

of the explicit language 

in the substantive rules. 

EPA’s review of the term 

as used in the title 18, 

chapter 2 of the AAC 

supports ADEQ’s 

conclusion. The explicit 

language or context 

clearly indicates that 

“attainment area” as 

used in applicable AAC 

rules refers to areas 

designated as 

attainment, not simply 

areas that are found to 

attain the NAAQS (but 

still designated as 

nonattainment). 

Approve.

20 Begin actual 

construction

Will be evaluated in a separate rulemaking.
20

21 Best available 

control 

technology

Similar to existing SIP, but portion of 

definition has been moved to R18-2-

406(A)(4), which is appropriate since it 

contains requirements rather than 

definition language. Acceptable.

Approve

22 Btu Similar to existing SIP. Acceptable. Approve

23 Categorical 

sources

Similar to existing SIP. Acceptable. Approve

24 Categorically 

exempt 

activities

New definition. List of small engines and 

boilers which are not subject to NSR, if this 

is the only equipment at the facility. 

Basically NSR exempt equipment, with 

caveat. All listed equipment below 

acceptable exemption levels. Acceptable.

Approve 

25 CFR Similar to existing SIP. Acceptable. Approve

26 Charge Similar to existing SIP. Acceptable. Approve

27 Clean coal 

technology

New to SIP. Same as definition in 40 CFR 

51.166(b)(33). 

Approve

28 Clean coal 

technology 

demonstration 

project

New to SIP. Same as definition in 40 CFR 

51.166(b)(34). 

Approve

29 Coal Similar to existing SIP but includes updated 

ASTM reference. Acceptable.

Approve

30 Combustion Same as existing SIP. Acceptable. Approve

31 Commence Similar to existing SIP. Reference to title IV

has been removed. Acceptable.

Approve

32 Construction Will be evaluated in a separate rulemaking.

33 Continuous 

monitoring 

system

Revised to refer to CEMS, CERMS, or CPMS. Approve

34 Continuous 

emissions 

monitoring 

system

CEMS - New to SIP. Similar to definition of 

corresponding term in 40 CFR 

51.166(b)(43). Acceptable.

Approve

35 Continuous 

emissions rate 

monitoring 

system

CERMS - New to SIP. Same as definition of 

corresponding term in 40 CFR 

51.166(b)(46). Acceptable.

Approve

36 Continuous 

parameter 

monitoring 

system

CPMS - New to SIP. Similar to definition of 

corresponding term in 40 CFR 

51.166(b)(45). Acceptable.

Approve

37 Controlled 

atmosphere 

incinerator

Same as existing SIP. Included as 

subparagraph (b) within definition of 

“incinerator” at R9-3-101(81). Acceptable.

Approve
21

38 Conventional 

air pollutant

New to SIP as a definition in the Arizona 

Administrative Code, but it is the same as 

the definition approved into the Arizona SIP 

as ARS 49-401.01(10). Acceptable.

Approve

39 Department Updated to refer to the Department of 

Environmental Quality instead of the 

Department of Health Services. Acceptable.

Approve

40 Director Updated to refer to the Director of the 

Department of Environmental Quality 

instead of the Director of the Department 

of Health Services. Acceptable.

Approve

41 Discharge Similar to existing SIP. Acceptable. Approve

42 Dust Same as existing SIP. Acceptable. Approve

43 Dust 

suppressant

Same as existing SIP. Acceptable. Approve

44 Effluent Same as existing SIP. Acceptable. Approve

45 Electric utility 

steam 

generating unit

New to the SIP. Same as the definition in 40 

CFR 51.166(b)(30). Acceptable.

Approve

46 Emission Same as existing SIP. Acceptable. Approve

47 Emission 

standard

Revised to reflect the definition of this term 

and “emission limitation” in 40 CFR 

51.100(z). Acceptable.

Approve

48 Emissions unit Revised to use the term “regulated air 

pollutant” and to refer specifically to 

electric steam generating units. Acceptable.

Approve

49 Equivalent 

method

Revised to include a reference to R18-2-

311, which was included in the May 16, 

2014 supplement to the July 28, 2011 SIP 

submittal. This definition reflects significant 

Director’s discretion in approval of 

equivalent method but would be an 

improvement over the existing SIP 

(compare existing SIP R9-3-310, paragraph 

C). 

Approve

50 Excess 

emissions

Same as existing SIP. As codified, this 

definition could be in conflict with principle 

of credible evidence (see 40 CFR 51.212(c)) 

because “excess emissions” is defined by 

reference to measurements “by the 

compliance test method applicable to such 

emission standard,” thereby potentially 

precluding other credible evidence of an 

excess of an emissions standard in conflict 

with 40 CFR 51.212(c). In contrast, 40 CFR 

51.100(bb) defines excess emissions as 

Approve, but request

clarification from ADEQ 

of whether the definition 

of “excess emissions” 

precludes use of credible 

evidence in establishing 

whether an emissions 

standard has been 

violated.
22

“emissions of an air pollutant in excess of 

an emission standard.”

51 Federal 

applicable 

requirement

New to SIP. Similar to definition of 

“applicable requirement” in 40 CFR 70.2, 

but missing “any standard or other 

requirement under section 126(a)(1) and 

(c) of the Act.” CAA section 126 relates to 

interstate pollution abatement.

ADEQ indicates that that 

the failure to include the 

missing element was 

inadvertent although as a 

practical matter, the fact 

that it is missing 

probably make no 

substantive difference 

given the expansiveness 

of other listed elements. 

In addition, to the extent 

there is a deficiency, it is 

a title V deficiency, not a 

SIP deficiency. Approve, 

but recommend that 

ADEQ revise the 

definition accordingly 

when the next 

opportunity to revise 

R18-2-101 presents 

itself.

52 Federal land 

manager

Same as existing SIP. Same as 40 CFR 

51.166(b)(24). Acceptable.

Approve

53 Federally 

enforceable

Similar to existing SIP, with new language 

to clarify treatment of ‘state only’ 

conditions in permits. Equivalent to 

definition of corresponding term in 40 CFR 

51.166(b)(17). Acceptable.

Approve

54 Federally listed 

hazardous air 

pollutant

New to SIP. Acceptable. Approve

55 Final permit New to SIP. Similar to corresponding 

definition in 40 CFR 70.2. Acceptable.

Approve

56 Fixed capital 

cost

Same as existing SIP. Same as 40 CFR 

51.166(b)(55). Acceptable.

Approve

57 Fuel Same as existing SIP. Acceptable. Approve

58 Fuel burning 

equipment

Same as existing SIP. Acceptable. Approve

59 Fugitive 

emissions

Same as existing SIP. Same as 40 CFR 

51.166(b)(20). Acceptable.

Approve

60 Fume Same as existing SIP. Acceptable. Approve

61 Fume 

incinerator

Same as existing SIP. Included as 

subparagraph (f) within definition of 

“incinerator” at R9-3-101(81). Acceptable.

Approve
23

62 Good 

engineering 

practice (GEP) 

stack height

Existing SIP spells out these requirements. 

New submittal references R18-2-332, which 

was included in the October 29, 2012 SIP 

revision submittal. The provisions of R18-2-

332 are essentially equivalent to those set 

forth at 40 CFR 51.100(ii). Acceptable.

Approve

63 Hazardous air 

pollutant

Revised to refer to the federally listed 

HAPs. This definition cites a provision of the 

AAC not submitted as part of the SIP, but 

given that the definition relates to non-SIP 

matters, the omission would be harmless.

Approve

64 Heat input Same as existing SIP. Acceptable Approve

65 Incinerator Same as existing SIP except that definitions 

for specific types of incinerators (e.g., 

multiple chamber incinerators) have been 

relocated and listed in the definitions rule 

individually instead of paragraphs under 

“incinerator.” Acceptable.

Approve

66 Indian 

governing body

Same as existing SIP and same as 40 CFR 

51.166(b)(28).

Approve

67 Indian 

reservation

Same as existing SIP and same as 40 CFR 

51.166(b)(27).

Approve

68 Insignificant 

activity

New definition. Specific list of equipment 

and/or activities. Term used in connection 

with the NSR program.

Approve, but reconsider 

in context of future 

action on revised NSR 

rules.

69 Kraft pulp mill Same as existing SIP. Acceptable. Approve

70 Lead Same as existing SIP. Acceptable. Approve

71 Lime hydrator Same as existing SIP. Acceptable. Approve

72 Lime plant Same as existing SIP definition for “lime 

manufacturing plant.” Acceptable.

Approve

73 Lime product Similar to existing SIP. Acceptable. Approve

74 Major 

modification

Similar to existing SIP, consistent with term 

defined in both 51.165 and 51.166.

Acceptable.

Approve 

75 Major source Similar to existing SIP (R9-3-101), in that it 

includes same definition for NA areas. New 

definition also includes definition for 

attainment areas and for HAPs. Sec. 49-

401.01 definition was for Title V major 

sources, which is now covered by 

broadness of new definition. Acceptable.

Approve 

76 Malfunction Same as existing SIP. Similar to definition of 

this term in 40 CFR 60.2. Acceptable.

Approve

77 Minor source Same as existing SIP but the statutory 

reference has been updated. Acceptable. 

Approve
24

78 Minor source 

baseline area

New to SIP. Refers to air quality control 

regions (AQCRs) established in Arizona and 

approved by EPA. The AQCRs were not 

used for area designations under section 

107, however, and thus may not be the 

correct areas in which to track increment 

consumption for PSD purposes.

Approve, but reconsider 

in context of future 

action on revised NSR 

rules.

79 Mobile source Same as definition from existing SIP ARS 

49-401.01(18). Acceptable.

Approve

80 Modification Similar to existing SIP, but establishes a 

potential to potential test for modifications 

at minor sources. ADEQ has provided no 

analysis upon which to conclude that this 

relaxation would not interfere with 

attainment of the NAAQS or any other 

applicable requirement of the Act.

Approve, but reconsider 

in context of future 

action on revised NSR 

rules.

81 Monitoring 

device

Same as existing SIP. Similar to 40 CFR 60.2. 

Acceptable.

Approve

82 Motor vehicle Same as existing SIP. Acceptable. Approve

83 Multiple 

chamber 

incinerator

Same as existing SIP. Included as 

subparagraph (a) within definition of 

“incinerator” at R9-3-101(81). Acceptable.

Approve

84 Natural 

conditions

New to SIP. Same as corresponding 

definition in 40 CFR 51.301. Acceptable. 

Approve

85 National 

ambient air 

quality 

standard

Same as definition from existing SIP ARS 

49-401.01(20). Acceptable.

Approve

86 Necessary 

preconstruction 

approvals or 

permits

Similar to existing SIP. Satisfies the 

definition in 51.166 (b)(10). Acceptable.

Approve

87 Net emissions 

increase

Will be evaluated in a separate rulemaking.

88 New source Revised to refer to any stationary source 

which is subject to an applicable new 

source performance standard under AAC, 

title 18, chapter 2, article 9 instead to any 

major stationary source constructed or 

modified after May 14, 1979. Acceptable.

Approve

89 Nitric acid plant Same as existing SIP. Same as 40 CFR 

51.100(cc). Acceptable.

Approve

90 Nitrogen oxides Revised to refer to test methods in 40 CFR 

part 60 rather than the Arizona Testing 

Manual. Similar to definition of 

corresponding term in 40 CFR 60.2.

Acceptable.

Approve
25

91 Nonattainment 

area

Same as existing SIP. Acceptable. Approve

92 Nonpoint 

source

Same as existing SIP. Acceptable. Approve

93 Opacity Expanded to mirror the definition of the 

corresponding term in 40 CFR 60.2. 

Acceptable.

Approve

94 Operation Same as existing SIP. Acceptable. Approve

95 Owner or 

operator

Expanded to refer to, among other things, 

any stationary source as opposed to a 

stationary source “of which an affected 

facility is a part.” Acceptable.

Approve

96 Particulate 

matter

Revised to mirror the definition in 40 CFR 

51.100(oo). Acceptable.

Approve

97 Particulate 

matter 

emissions

New to SIP. Similar to definition of 

corresponding term in 40 CFR 51.100(pp). 

Acceptable.

Approve

98 Permitting 

authority

Similar to definition from existing SIP ARS 

49-401.01(23). Acceptable. 

Approve

99 Permitting 

exemption 

thresholds

New to SIP. Permit exemptions set at 50% 

of PSD significance thresholds. Need to 

review supporting documentation to 

determine if thresholds are acceptable. 

Approve, but reconsider 

in context of future 

action on revised NSR 

rules.

100 Person Same as existing SIP. Acceptable. Approve

101 Planning 

agency

Same as definition from existing SIP ARS 

49-401.01(24). Acceptable.

Approve

102 Predictive 

emissions 

monitoring 

system

New to SIP. Similar to definition of 

corresponding term in 40 CFR 

51.166(b)(44). Acceptable.

Approve

103 PM2.5 New to SIP. Acceptable. Approve

104 PM10 New to SIP. Similar to definition in 40 CFR 

51.100(qq). Acceptable.

Approve

105 PM10 

emissions

New to SIP. Similar to definition in 40 CFR 

51.100(rr). Acceptable.

Approve

106 Plume Same as existing SIP. Acceptable. Approve

107 Pollutant Similar to existing SIP. Acceptable. Approve

108 Portable source New to SIP. Acceptable. Approve

109 Potential to

emit

Will be evaluated in a separate rulemaking.

110 Primary 

ambient air 

quality 

standards

Revised to refer to the standards listed in 

title 18, chapter 2, article 2, as opposed to 

those judged necessary by EPA. Since 

article 2 standards reflect EPA standards, 

this is acceptable.

Approve

111 Process Same as existing SIP. Acceptable. Approve
26

112 Project New to SIP. Same as definition of 

corresponding term in 40 CFR

51.166(b)(51). Acceptable.

Approve

113 Proposed 

permit

New to SIP. Similar to definition of 

corresponding term in 40 CFR 70.2. 

Contains a reference to a rule (R18-2-

307(D)) not submitted for SIP approval, but 

the reference relates to title V procedures, 

which do not need to be approved as part 

of the SIP. Acceptable.

Approve

114 Proposed final 

permit

New to SIP. Contains a reference to a rule 

(R18-2-307(A)) not submitted for SIP 

approval, but the reference relates to title 

V procedures, which do not need to be 

approved as part of the SIP. Acceptable.

Approve

115 Reactivation of 

a very clean 

coal-fired 

electric utility 

steam 

generating unit

New to SIP. Mirrors the definition of the 

corresponding term in 40 CFR 

51.166(b)(37). Acceptable.

Approve

116 Reasonable 

further 

progress

New to SIP. Acceptable. Approve

117 Reasonably 

available 

control 

technology

Revised substantially relative to existing SIP 

definition. Used in connection with the NSR 

program. Acceptable.

Approve 

118 Reclaiming 

machinery

Same as existing SIP. Acceptable. Approve

119 Reference 

method

Revised to include various EPA references 

in addition to the Arizona Testing Manual. 

Acceptable.

Approve

120 Regulated air 

pollutant

New to SIP. Similar to the definition of the 

same term in 40 CFR 70.2; however, the 

references in this definition to Articles 9 

and 17 may not cover the same pollutants 

as the corresponding provisions in the 

definition of “regulated air pollutant” in 40 

CFR 70.2. 

Approve, but reconsider 

in context of future 

action on revised NSR 

rules.

121 Regulated 

minor NSR 

pollutant

New to SIP. May need to be revised to 

address PM10 precursors in PM10

nonattainment areas, and additional PM2.5

precursors in PM2.5 nonattainment areas in 

light of the decision in Natural Resources 

Defense Council v. EPA, 706 F.3d 428 (D.C. 

Cir. 2013).

Approve, but reconsider 

in context of future 

action on revised NSR 

rules.
27

122 Regulated NSR 

pollutant

Will be evaluated in a separate rulemaking.

123 Repowering New to SIP. Mirrors definition of 

corresponding term in 40 CFR 

51.166(b)(36). Acceptable.

Approve

124 Run Same as existing SIP. Similar to definition of 

corresponding term in 40 CFR 60.2. 

Acceptable.

Approve

125 SCREEN model New to SIP. Refers to AERSCREEN model 

published by EPA in April 2011. Acceptable.

Approve

126 Secondary 

ambient air 

quality 

standards

Revised to refer to the standards listed in 

title 18, chapter 2, article 2, as opposed to 

those judged necessary by EPA. Since 

article 2 standards reflect EPA standards, 

this is acceptable.

Approve

127 Secondary 

emissions

Revised to exclude emissions from trains 

coming to or from the new or modified 

station source. However, this revision is 

consistent with the definition of the 

corresponding term in 40 CFR 

51.166(b)(18). Acceptable.

Approve

128 Section 302(j) 

category

New to SIP. CAA section 302(j) provides: 

“Except as otherwise expressly provided, 

the terms ‘major stationary source’ and 

‘major emitting facility’ mean any 

stationary facility or source of air pollutants 

which directly emits, or has the potential to 

emit, [100] tons per year or more of any air 

pollutant (including any major emitting 

facility or source of fugitive emissions of 

any such pollutant, as determined by rule 

by the [EPA].” The definition of “section 

302(j) category” refers to “categorical” 

sources in subparagraph (23) of R18-2-101, 

which list the specific categories of sources 

that are considered “major” for the 

purposes of the PSD program. 

Approve, but reconsider 

in context of future 

action on revised NSR 

rules.

129 Shutdown Same as existing SIP. Similar to definition of 

corresponding term in 40 CFR 60.2 except 

that the definition in AAC excludes “routine 

phasing out of process equipment” from 

the definition of “shutdown.” Acceptable.

Approve

130 Significant Similar to existing SIP but adds additional 

thresholds for pollutants that have become 

“regulated NSR pollutants” since the SIP 

definition was last approved and deletes 

certain thresholds for HAPs, which are no 

Approve, but reconsider 

in context of future 

action on revised NSR 

rules.
28

longer regulated under the PSD program. 

May need to be revised to address GHGs 

and additional PM2.5 precursors.

131 Significant 

emissions 

increase

New to SIP. Same as PSD definition in 40 

CFR 51.166(b)(39). Acceptable.

Approve, but reconsider 

in context of future 

action on revised NSR 

rules.

132 Smoke Same as existing SIP. Acceptable. Approve

133 Source Same as definition from existing SIP ARS 

49-401.01(29). Acceptable.

Approve

134 Stack Same as existing SIP. Same as 40 CFR 

51.100(ff). Acceptable.

Approve

135 Stack in 

existence

New to SIP. Same as 40 CFR 51.100(gg). 

Acceptable.

Approve

136 Start-up Same as existing SIP. Acceptable. Approve

137 State 

implementation 

plan

Revised to refer to the accumulated record 

of enforceable air pollution control 

measures approved by EPA. Acceptable.

Approve

138 Stationary 

rotating 

machinery

Same as existing SIP. Acceptable. Approve

139 Stationary 

source

Same as existing SIP. This definition refers 

to ARS 49-426(A), which is a statutory 

provision thatwas included in the May 16, 

2014 supplement to the July 28, 2011 SIP 

submittal and is being approved herein.

Approve

140 Sulfuric acid 

plant

Same as existing SIP. Similar to the 

definition of the corresponding term in 40 

CFR 51.100(dd).

Approve

141 Temporary 

clean coal 

technology 

demonstration 

project

New to SIP. Similar to the definition of the 

corresponding term in 40 CFR 

51.166(b)(35).

Approve

142 Temporary 

source

New to SIP. Means a source which is 

portable, “as defined in A.R.S. § 49-

401.01(23) and which is not an “affected 

source.” A version of A.R.S. § 49-401.01 is 

approved in the SIP, but version approved 

in the SIP does not include a definition of 

“portable source” in subsection (23). 

However, this term is used in connection 

with the Title V program and the related 

definition of “federal applicable 

requirement” in R18-2-101 and need not 

be approved into the SIP. Therefore, the 

Approve, but reconsider 

in context of future 

action on revised NSR 

rules.
29

deficiency does not preclude approval into 

the SIP. 

143 Total reduced 

sulfur

Same as existing SIP. Acceptable. Approve

144 Trivial activities New to SIP. Refers to activities and sources 

that may be omitted from a permit or 

registration application.

Approve, but reconsider 

in context of future 

action on revised NSR 

rules.

145 Unclassified 

area

Similar to existing SIP. Acceptable. Approve

146 Uncombined 

water

Same as existing SIP. Acceptable. Approve

147 Urban or 

suburban open 

area

Same as existing SIP. Acceptable. Approve

148 Vacant lot Same as existing SIP. Acceptable. Approve

149 Vapor Same as existing SIP. Acceptable. Approve

150 Visibility 

impairment

New to SIP. Same as definition of 

corresponding term in 40 CFR 51.301. 

Acceptable.

Approve

151 Visible 

emissions

Same as existing SIP. Acceptable. Approve

152 Volatile organic 

compounds

Revised to reflect the current list of exempt 

compounds in 40 CFR 51.100(s). 

Acceptable.

Approve

153 Wood waste 

burner

Similar to existing SIP. Included as 

subparagraph (c) within definition of 

“incinerator” at R9-3-101(81). Acceptable.

Approve

R18-2-102 (“Incorporated Materials”)

Normally, materials that the State incorporates by reference should be submitted along with the 

rule that incorporates them, and ADEQ has not submitted the ASTM test methods or GPO’s 1987 

manual for approval as part of the SIP. However, with respect to the ASTM test methods and GPO 1987 

manual, no submittal is necessary because, with respect to the ASTM test methods, they have already 

been incorporated by reference in 40 CFR part 60.17(a), and the GPO 1987 manual is a standard Federal 

reference. Recommend approval.

Arizona Administrative Code, Title 18 (“Environmental Quality”), Chapter 2 (“Department of 

Environmental Quality – Air Pollution Control”), Article 2 (“Ambient Air Quality Standards; Area 

Designations; Classifications”)

R18-2-201 (“Particulate matter: PM10 and PM2.5“)

Amended to add subsections (A)(3)(a) and (A)(3)(b), which determines test methods to measure 

PM10. Subsection (B) was added to incorporate the primary and secondary ambient air quality standards 

for PM2.5 and to reference methods used to measure PM2.5, and to determine attainment of the 

standards. The existing SIP rules (R9-3-201 and R9-3-218) include outdated standards and methods for 

determining attainment. Recommend approval.
30

R18-2-202 (“Sulfur oxides (sulfur dioxide)”)

The rule, as amended, updates the sulfur dioxide ambient air quality standards to reflect EPA 

regulations at 40 CFR 50.5 and 50.17. The amended rule also provides for the revocation of the annual 

and 24-hour primary SO2 standards in most areas of the state upon the “effective date of the 

designation” for the new 1-hour SO2 standard. See R18-2-202(D)(2). However, under 40 CFR 50.4, the 

annual and 24-hour standard remain applicable until one year after the effective date; and thus, R18-2-

202 revokes the annual and 24-hour primary SO2 standards one year too soon. Recommend approval 

but also recommend that ADEQ conform the rule to the revocation schedule set forth in 40 CFR 50.4.

R18-2-203 (“Ozone: 1-hour standard and 8-hour averaged Standard”)

The rule, as amended, adds an 8-hour ozone standard to reflect the 2008 national standards and 

to revoke the 1-hour ozone standard after June 15, 2005. This is acceptable. The existing SIP rules (R9-3-

204 and R9-3-218) includes outdated standards and methods for determining attainment. Recommend 

approval.

R18-2-204 (“Carbon monoxide”)

Most recent amendments became effective September 26, 1990 and were included in ADEQ’s 

May 16, 2014 supplement for approval as part of the SIP. The rule, as amended, adds language 

consistent with 40 CFR 50.8(c) and 50.8(d). This is acceptable. Approval of R18-2-204 would supersede 

existing SIP rule R9-3-305 (“Carbon monoxide”), approved on October 19, 1984 (49 FR 41026).

Recommend approval.

R18-2-205 (“Nitrogen Oxides (Nitrogen Dioxide)”)

The rule, as amended, updates the NO2 ambient air quality standards to reflect EPA regulations 

at 40 CFR 50.11. The corresponding provision in the existing SIP is R9-3-206 (“Nitrogen Dioxide”), 

approved on October 19, 1984 (49 FR 41026). Recommend approval.

R18-2-206 (“Lead”)

The rule, as amended, updates the lead ambient air quality standards to reflect EPA regulations 

at 40 CFR 50.16 and provides for the revocation of the original lead ambient air quality standard set 

forth at 40 CFR 50.12. The corresponding provision in the existing SIP is R9-3-207 (“Lead”), approved on 

October 19, 1984 (49 FR 41026). Recommend approval.

R18-2-210 (“Attainment, Nonattainment, and Unclassifiable Area Designations”)

This rule incorporates by reference the area designations as of July 1, 2011, but as such, does 

not include a number of new designations and redesignations in Arizona. Recommend approval but also 

recommend that ADEQ update R18-2-210 to reflect current air quality planning area designations in the 

State of Arizona.

R18-2-215 (“Ambient air quality monitoring methods and procedures”)

The rule, as amended, refers to 40 CFR part 58 rather than the Arizona Testing Manual for 

applicable quality assurance, monitor siting, and sample probe installation procedures. This is 

acceptable. Recommend approval.

R18-2-216 (“Interpretation of Ambient Air Quality Standards”)

The rule was amended to remove a reference to Appendix 10 (repealed) and to add a reference 

to appendix 2. (See evaluation of appendix 2.) Recommend approval.
31

R9-3-218 (“Violations”)(Rescission)

This corresponding renumbered rule, R18-2-219, was repealed effective August 7, 2012. ADEQ 

previously submitted but did not list the repeal of R18-2-219 as part of the SIP revision, but has since 

clarified that rescission of the existing SIP rule, R9-3-218, is requested. R9-3-218 is outdated and 

deletion of it from the SIP would be consistent with the other revisions being made to title 18, chapter 2, 

article 2 and evaluated herein. Recommend approval of the rescission of existing SIP rule R9-3-218.

Appendix 2 (“Test Methods and Protocols”)

Appendix 2 incorporates by reference the test methods and protocols codified in 40 CFR parts 

50, 51, 52, 53, 58, 60, 61, 63, and 75. Appendix 2 is referenced in R18-2-216. All of the test methods and 

protocols incorporated by reference in appendix 2 are already Federal law, and thus, there is no need 

for ADEQ to submit the individual test methods and protocols to EPA for approval into the SIP. The 

version of appendix 2 included in the May 16, 2014 supplement to the July 28, 2011 SIP submittal refers 

to the methods and protocols revised as of July 1, 2006. Recommend approval.

Appendix 10 (“Evaluation of Air Quality Data”)(Rescission)

Repealed because it contains outdated monitoring protocols. Approval of the repeal of appendix 

10 would provide EPA with the basis to delete existing SIP appendix 10 without replacement from the 

Arizona SIP. Such deletion without replacement would be acceptable given that it contains outdated 

monitoring protocols and newly submitted appendix 2 (above) provides updated protocols. Recommend 

approval of rescission request.

Arizona Testing Manual for Air Pollutant Emissions (Revision F, March 1992)

ADEQ included sections 1 and 7 of the Arizona Testing Manual in its May 16, 2014 supplement. 

A previous version of section 1 was approved into the SIP; section 7 would be new. Approval of section 1 

would update the corresponding section in the Arizona Testing Manual in the existing SIP. Section 7 is 

Test Method A1, which is a test method that is relied upon cited in paragraph (E) of R18-2-715, which is 

the part of the portion of R18-2-715 that is recommended for deferral herein. Recommend approval of 

section 1 but defer action on section 7 consistent with the relevant portion of R18-2-715.

Arizona Administrative Code, Title 18 (“Environmental Quality”), Chapter 2 (“Department of 

Environmental Quality – Air Pollution Control”), Article 6 (“Emissions from Existing and New Nonpoint 

Sources”)

R18-2-601 (“General”)

Renumbered and updated to reflect the recodification of article 4 as article 6. It contains an 

obsolete reference to AAC title 9, chapter 3, article 8, which is now codified at AAC title 18, chapter 2, 

article 9. Arizona corrected this reference administratively and now the correct reference is found in the 

version of the rule codified in the AAC. The current codification of the rule was included in ADEQ’s May 

16, 2014 supplement. Recommend approval.

R18-2-604 (“Open areas, dry washes or riverbeds”)

The rule was renumbered and a statutory reference was updated but no other changes were 

made relative to the existing SIP version. This particular rule continues to apply a “reasonable 

precautions” standard that is too vague to be practically enforceable. However, approval of the 

renumbered version of the rule reduces the SIP gap and the potential confusion with cross-references in 

other rules to this rule, as renumbered. Further, this rule is not relied upon to meet any CAA part D 
32

nonattainment area requirement. The current codification of the rule was included in ADEQ’s May 16, 

2014 supplement. Recommend approval.

R18-2-605 (“Roadways and streets”)

The rule was renumbered but the text of the rule itself was not included. Based on a review of 

the current codification of the rule in the AAC, no other changes (other than renumbering) were made 

relative to the existing SIP version. This particular rule continues to apply a “reasonable precautions” 

standard that is too vague to be practically enforceable. However, approval of the renumbered version 

of the rule reduces the SIP gap and the potential confusion with cross-references in other rules to this 

rule, as renumbered. Further, this rule is not relied upon to meet any CAA part D nonattainment area 

requirement. The current codification of the rule was included in ADEQ’s May 16, 2014 supplement. 

Recommend approval.

R18-2-606 (“Material handling”)

The rule was renumbered but the text of the rule itself was not included. Based on a review of 

the current codification of the rule in the AAC, no other changes (other than renumbering) were made 

relative to the existing SIP version. This particular rule continues to apply a “reasonable precautions” 

standard that is too vague to be practically enforceable. However, approval of the renumbered version 

of the rule reduces the SIP gap and the potential confusion with cross-references in other rules to this 

rule, as renumbered. Further, this rule is not relied upon to meet any CAA part D nonattainment area 

requirement. The current codification of the rule was included in ADEQ’s May 16, 2014 supplement.

Recommend approval.

R18-2-607 (“Storage piles”)

The rule was renumbered but the text of the rule itself was not included. Based on a review of 

the current codification of the rule in the AAC, no other changes (other than renumbering) were made 

relative to the existing SIP version. This particular rule continues to apply a “reasonable precautions” 

standard that is too vague to be practically enforceable. However, approval of the renumbered version 

of the rule reduces the SIP gap and the potential confusion with cross-references in other rules to this 

rule, as renumbered. Further, this rule is not relied upon to meet any CAA part D nonattainment area 

requirement. The current codification of the rule was included in ADEQ’s May 16, 2014 supplement. 

Recommend approval.

R18-2-608 (“Mineral Tailings”)

Amended to include the language “or own or otherwise operate” in order to clarify that 

pollution control measures should continue after the construction of mineral tailings piles and during 

periods when tailings piles are inactive. This revision is not a SIP relaxation as its purpose is to clarify the 

rule’s continuing applicability. This particular rule continues to apply a “reasonable precautions” 

standard that is too vague to be practically enforceable. However, approval of the amended and 

renumbered version of the rule reduces the SIP gap and the potential confusion with cross-references in 

other rules to this rule, as renumbered. Further, this rule is not relied upon to meet any CAA part D 

nonattainment area requirement. Recommend approval.

R18-2-614 (“Evaluation of nonpoint source emissions”)

Included in ADEQ’s May 16, 2014 supplement. Since approval of the corresponding SIP rule, R9-

3-410, the rule has been renumbered (to R18-2-614) and revised to reflect other rule recodifications. 

The rule continues to apply a 40% opacity standard, which does not represent RACM/RACT. 
33

Nonetheless, approval of this rule would reduce the SIP gap, and this rule is not relied upon to meet any 

CAA part D nonattainment area requirement. Recommend approval.

Arizona Administrative Code, Title 18 (“Environmental Quality”), Chapter 2 (“Department of 

Environmental Quality – Air Pollution Control”), Article 7 (“Existing Stationary Source Performance 

Standards”)

R18-2-701 (“Definitions”)

The following table provides an evaluation and recommendation for each defined term included 

in R18-2-701, as submitted on October 29, 2012.

Paragraph 

#

Defined Term: Evaluation Recommendation

1 Acid mist Revised to refer to the 40 CFR part 60, 

appendix A. Acceptable.

Approve

2 Architectural 

coating

Similar to existing SIP. Acceptable. Approve

3 Asphalt concrete 

plant

Revised to include the specific processes 

that comprise an “asphalt concrete plant” 

for the purposes of the rule as formerly set 

forth in the related substantive rule (R9-3-

508, now R18-2-708). Acceptable.

Approve

4 Black liquor Same as existing SIP. Acceptable. Approve

5 Boiler New to SIP. Mirrors definition of this term in 

a number of EPA regulations, e.g., 40 CFR 

97.2. Acceptable.

Approve

6 Bottoming-cycle 

cogeneration unit

New to SIP. Similar to definition of this term 

in a number of EPA regulations, e.g., 40 CFR 

97.402. Acceptable.

Approve

7 Calcine Same as existing definition but “lime plant” 

has been substituted for “roaster.” 

Acceptable.

Approve

8 Coal Revised to update ASTM references. Similar 

to definition in 40 CFR 60.41. Acceptable.

Approve

9 Coal-derived fuel New to SIP. Mirrors definition of this term in 

a number of EPA regulations, e.g., 40 CFR 

97.402. Acceptable.

Approve

10 Coal-fired New to SIP. In article 7, the term is only used 

in rules, such as R18-2-733, R18-2-733.01 

and R18-2-734, that have not been 

submitted as part of the SIP, nor would they 

be appropriate as part of the SIP, because 

they relate to HAPs, not NAAQS. Thus, no 

review of this term is necessary.

Approve

11 Cogeneration unit New to SIP. Relied upon by other definitions 

in R18-2-701 that are used in connection 

with rules that regulate HAP emissions and 

Approve
34

that have not been submitted for approval 

as part of the SIP. No review is necessary.

12 Combustion turbine New to SIP. Relied upon by other definitions 

in R18-2-701 that are used in connection 

with rules that regulate HAP emissions and 

that have not been submitted for approval 

as part of the SIP. No review is necessary. 

Approve

13 Commercial 

operation

New to SIP. The only rule that uses this term 

is R18-2-734 (“State Standards of 

Performance for Mercury Emissions from 

Coal-Fired Electric Steam Generating Units”), 

which has not been submitted as part of the 

SIP, nor is it appropriate for the SIP, because 

it relates to HAPs, not NAAQS. Thus, no 

review of this term is necessary. 

Approve

14 Concentrate Formerly, the term that was defined was 

“copper concentrate.” However, other than 

that, the definition is unchanged. 

Acceptable.

Approve

15 Concentrate dryer Formerly, the term that was defined was 

“copper concentrate dryer.” However, other 

than that, the definition is unchanged. 

Acceptable.

Approve

16 Concentrate roaster Formerly, the term that was defined was 

“copper concentrate roaster.” However, 

other than that, the definition is unchanged. 

Acceptable.

Approve

17 Condensate stripper 

system

Same as existing SIP. Acceptable. Approve

18 Control device Same as existing SIP. Acceptable. Approve

19 Converter Formerly, the term that was defined was 

“copper converter.” However, other than 

that, the definition is unchanged. 

Acceptable.

Approve

20 Electric generating 

plant

New to SIP. In article 7, the term is only used 

in rules, such as R18-2-733.01 and R18-2-

734, that have not been submitted as part of 

the SIP, nor would they be appropriate as 

part of the SIP, because they relate to HAPs, 

not NAAQS. Thus, no review of this term is 

necessary.

Approve

21 Electric generating 

unit

New to SIP. In article 7, the term is only used 

in rules, such as R18-2-733.01 and R18-2-

734, that have not been submitted as part of 

the SIP, nor would they be appropriate as 

part of the SIP, because they relate to HAPs, 

Approve
35

not NAAQS. Thus, no review of this term is 

necessary.

22 Existing electric 

generating plant

New to SIP. The only rule that uses this term 

is R18-2-733.01, which has not been 

submitted as part of the SIP, nor is it 

appropriate for the SIP, because it relates to 

HAPs, not NAAQS. Thus, no review of this 

term is necessary. 

Approve

23 Existing source Same as existing SIP. Moved from R18-2-101 

to R18-2-701. Acceptable. 

Approve

24 Facility Same as existing SIP. Acceptable. Approve

25 Fugitive dust Same as existing SIP. Acceptable. Approve

26 High sulfur oil This term had been included in certain 

prohibitory rules approved as part of the SIP 

(e.g., R9-3-503), but the definition has been 

moved to R18-2-701. Other than being 

relocated to the definitions rule, no other 

change has been made to this definition. 

Acceptable. 

Approve

27 Incremental best 

available control 

technology

New to SIP. The only rule that uses this term 

is R18-2-734 (“State Standards of 

Performance for Mercury Emissions from 

Coal-Fired Electric Steam Generating Units”), 

which has not been submitted as part of the 

SIP, nor is it appropriate for the SIP, because 

it relates to HAPs, not NAAQS. Thus, no 

review of this term is necessary. 

Approve

28 Inlet mercury New to SIP. The only rule that uses this term 

is R18-2-734 (“State Standards of 

Performance for Mercury Emissions from 

Coal-Fired Electric Steam Generating Units”), 

which has not been submitted as part of the 

SIP, nor is it appropriate for the SIP, because 

it relates to HAPs, not NAAQS. Thus, no 

review of this term is necessary. 

Approve

29 Lime kiln Same as existing SIP. Acceptable. Approve

30 Low sulfur oil This term had been included in certain 

prohibitory rules approved as part of the SIP 

(e.g., R9-3-503), but the definition has been 

moved to R18-2-701. Other than being 

relocated to the definitions rule, no other 

change has been made to this definition. 

Acceptable. 

Approve

31 Matte Formerly, the term that was defined was 

“copper matte.” However, other than that, 

the definition is unchanged. Acceptable.

Approve
36

32 Mercury New to SIP. In article 7, the term is only used 

in rules, such as R18-2-733, R18-2-733.01, 

and R18-2-734, that have not been 

submitted as part of the SIP, nor would they 

be appropriate as part of the SIP, because 

they relate to HAPs, not NAAQS. Thus, no 

review of this term is necessary.

Approve

33 Miscellaneous 

metal parts and 

products

Same as existing SIP. Acceptable. Approve

34 Multiple-effect 

evaporator system

Same as existing SIP. Acceptable. Approve

35 Nameplate capacity New to SIP. Relied on in the definition of the 

term “electric generating unit.” See 

discussion of that term.

Approve

36 Neutral sulfite 

semichemical 

pulping

Similar to existing SIP. Acceptable. Approve

37 Petroleum liquids Revised to include updated ASTM 

references. Acceptable.

Approve

38 Potential electric 

output capacity

New to SIP. Mirrors definition of this term in 

a number of EPA regulations, e.g., 40 CFR 

97.402. Acceptable.

Approve

39 Process source Same as existing SIP. Acceptable. Approve

40 Process weight Same as existing SIP. Acceptable. Approve

41 Process weight rate Revised to refer to R18-2-702(E). The correct 

reference is to R18-2-702(F). R18-2-702 has 

been approved as part of the SIP.

Approve but 

recommend that 

ADEQ revise R18-

2-701(41) to 

refer to R18-2-

702(F) instead of 

R18-2-702(E).

42 Recovery furnace Same as existing SIP. Acceptable. Approve

43 Reid vapor pressure Revised to include an updated ASTM 

reference. Acceptable.

Approve

44 Reverbatory 

smelting furnace

Formerly, the term that was defined was 

“copper reverberatory smelting furnace.” 

However, other than that, the definition is 

unchanged. Acceptable.

Approve

45 Rotary lime kiln Same as existing SIP. Acceptable. Approve

46 Slag More or less the same as existing SIP. 

Acceptable.

Approve

47 Smelt dissolving 

tank

Same as existing SIP. Acceptable. Approve

48 Smelter feed Same as existing SIP. Acceptable. Approve

49 Smelting Formerly, the term that was defined was 

“copper smelting.” However, other than 

Approve
37

that, the definition is unchanged.

Acceptable.

50 Smelting furnace Formerly, the term that was defined was 

“copper smelting furnace.” However, other 

than that, the definition is unchanged. 

Acceptable.

Approve

51 Standard conditions Same as existing SIP. Acceptable. Approve

52 Supplementary 

control system

Same as existing SIP. Acceptable. Approve

53 Topping-cycle 

cogeneration unit

New to SIP. Similar to the definition of this 

term in a number of EPA regulations, e.g., 40 

CFR 97.402. Acceptable.

Approve

54 Total energy output New to SIP. Similar to the definition of this 

term in a number of EPA regulations, e.g., 40 

CFR 97.402. Acceptable.

Approve

55 Vapor pressure Same as existing SIP. Acceptable. Approve

R18-2-703 (“Standards of Performance for Existing Fossil-Fuel Fired Steam Generators and General FuelBurning Equipment”)

Amended to correct an unclear reference to “0.08 pounds” in (G)(2) to specify “0.08 pounds of 

sulfur dioxide” and amended to remove the reference to Appendix 10. In addition, minor technical and 

grammatical changes have been made to improve the rules’ clarity, conciseness, and understandability 

and to conform to the formatting style required by the Arizona Secretary of State. R18-2-703 relies on 

terms “low sulfur oil” and “high sulfur oil” that are no longer defined in the rule (as they were in R9-3-

503). However, these terms are now defined along with many other terms in R18-2-701 (“Definitions”), 

which was submitted to EPA on October 29, 2012 and is evaluated herein. Recommend approval. 

R18-2-704 (“Standards of Performance for Incinerators”)

Amended to correct a misspelling in subsection (C) by changing the word “dearest” to “nearest.”

Recommend approval. 

R18-2-705 (“Standards of Performance for Existing Portland Cement Plants”)

The rule was renumbered and submitted on July 15, 1998, and re-submitted as currently 

codified on May 16, 2014. The current rule refers to R18-2-312 (Performance tests), which was included 

in the May 16, 2014 supplement to the July 15, 1998 SIP submittal. Based on a comparison of the 

current codification of the rule in the AAC with the existing SIP version of the rule, R18-2-705 has been 

amended to delete more stringent emissions limitations for particulate matter and opacity for subject 

sources located in Gila, Maricopa, Pima, Pinal, or Santa Cruz counties. Within those counties, the 

existing SIP rule includes separate emissions limitations and opacity limits for kilns and clinker coolers.

Recommend deferral of this rule pending further review of the deletion of the tighter emissions and 

opacity limits for subject sources in Gila, Maricopa, Pima, Pinal, or Santa Cruz counties to determine 

compliance with CAA sections 110(l) and 193.

R18-2-706 (“Standards of Performance for Existing Nitric Acid Plants”)

The rule was renumbered and included in ADEQ’s May 16, 2014 supplement. A comparison of 

R18-2-706 with the existing SIP version of the rule shows that no substantive changes in the rule have 
38

been adopted. The existing SIP rule refers to a rule, R18-2-313 (Existing source emission monitoring), 

that was approved into the SIP on November 5, 2012 (77 FR 66405). Recommend approval.

R18-2-707 (“Standards of Performance for Existing Sulfuric Acid Plants”)

The rule was renumbered and included in ADEQ’s May 16, 2014 supplement. A comparison of 

R18-2-707 with the existing SIP version of the rule shows that no substantive changes in the rule have 

been adopted. The existing SIP rule refers to a rule, R18-2-313 (Existing source emission monitoring), 

that was approved into the SIP on November 5, 2012 (77 FR 66405). Recommend approval.

R18-2-708 (“Standards of Performance for Existing Asphalt Concrete Plants”)

Amended to remove the reference to Appendix 10. Also, minor technical and grammatical 

changes have been made to improve the rules’ clarity, conciseness, and understandability and to 

conform to the formatting style required by the Arizona Secretary of State. Relative to the existing SIP 

rule R9-3-508, R18-2-708 no longer defines “asphalt concrete plant.” This term is now included in the list 

of definitions codified in R18-2-701, which has been submitted for approval as part of the SIP and is 

evaluated herein. R18-2-708 does not include the more stringent particulate matter emissions limits for 

subject sources located in Gila, Maricopa, Pima, Pinal, or Santa Cruz counties that are required under 

existing SIP rule R9-3-508. Recommend deferral of this rule pending further review of the deletion of the

tighter emissions and opacity limits for subject sources in Gila, Maricopa, Pima, Pinal, or Santa Cruz 

counties to determine compliance with CAA sections 110(l) and 193.

R9-3-509 (“Standards of Performance for Existing Petroleum Refineries”)(Rescission)

ADEQ requested rescission of R9-3-509 from the SIP through its May 16, 2014 supplement. In 

support of the rescission request, ADEQ provided a negative declaration stating that there are no 

petroleum refineries under ADEQ’s jurisdiction. This is sufficient justification for approval of the 

rescission request. Recommend approval of rescission request for R9-3-509. 

R18-2-711 (“Standards of Performance for Existing Secondary Lead Smelters”)

Amended to remove the reference to Appendix 10. Also, minor technical and grammatical 

changes have been made to improve the rules’ clarity, conciseness, and understandability and to 

conform to the formatting style required by the Arizona Secretary of State. Relative to the existing SIP 

rule R9-3-511, R18-2-711 does not include the more stringent particulate matter emissions limits for 

subject sources located in Gila, Maricopa, Pima, Pinal, or Santa Cruz counties that are required under 

existing SIP rule R9-3-511. Recommend deferral of this rule pending further review of the deletion of the 

tighter emissions and opacity limits for subject sources in Gila, Maricopa, Pima, Pinal, or Santa Cruz 

counties to determine compliance with CAA sections 110(l) and 193.

R18-2-712 (“Standards of Performance for Existing Secondary Brass and Bronze Ingot Production Plants”)

Amended to remove the reference to Appendix 10. Also, minor technical and grammatical 

changes have been made to improve the rules’ clarity, conciseness, and understandability and to 

conform to the formatting style required by the Arizona Secretary of State. Relative to the existing SIP 

rule R9-3-512, R18-2-712 does not include the more stringent particulate matter emissions limits for 

subject sources located in the Phoenix-Tucson Air Quality Control Region (i.e., Gila, Maricopa, Pima, 

Pinal, and Santa Cruz counties – see 45 FR 67345, October 10, 1980) that are required under existing SIP 

rule R9-3-512. Recommend deferral of this rule pending further review of the deletion of the tighter 

emissions and opacity limits for subject sources in Gila, Maricopa, Pima, Pinal, or Santa Cruz counties to 

determine compliance with CAA sections 110(l) and 193.
39

R18-2-713 (“Standards of Performance for Existing Iron and Steel Plants”)

Amended to remove the reference to Appendix 10. Also, minor technical and grammatical 

changes have been made to improve the rules’ clarity, conciseness, and understandability and to 

conform to the formatting style required by the Arizona Secretary of State. R18-2-713 requires sources 

to recalibrate certain monitoring devices in accordance with procedures in “Appendix 9 of the Chapter,” 

which was included in the May 14, 2014 supplement to the July 28, 2011 SIP submittal. Relative to the 

existing SIP rule R9-3-513, R18-2-713 does not include the more stringent particulate matter emissions 

limits for subject sources located in Gila, Maricopa, Pima, Pinal, and Santa Cruz counties that are 

required under existing SIP rule R9-3-513. Recommend deferral of this rule pending further review of 

the deletion of the tighter emissions and opacity limits for subject sources in Gila, Maricopa, Pima, Pinal, 

or Santa Cruz counties to determine compliance with CAA sections 110(l) and 193.

R18-2-714 (“Standards of Performance for Existing Sewage Treatment Plants”)

The rule was renumbered and included in ADEQ’s May 16, 2014 supplement. A comparison of 

R18-2-714 with the existing SIP version of the rule (R9-3-514) shows that no substantive changes in the 

rule have been adopted. Recommend approval.

R18-2-715 (“Standards of Performance for Existing Primary Copper Smelters; Site-specific Requirements”)

Amended to delete reference to the San Manuel smelter that is shutdown and for which the 

permit was terminated (in 2005). New smelters would be subject to New Source Review and not this 

section. Also, the rule has been amended to remove the reference to Appendix 10, and minor technical 

and grammatical changes have been made to improve the rules’ clarity, conciseness, and 

understandability and to conform to the formatting style required by the Arizona Secretary of State.

EPA redesignated the San Manuel sulfur dioxide nonattainment area to attainment in part based 

on the fact that the existing primary copper smelter had permanently ceased operation. See 73 FR 3396 

(January 18, 2008). Thus, the deletion of emission limits for the San Manuel smelter from Paragraphs F 

and G of R18-2-715 are acceptable.

R18-2-715, as submitted, also includes paragraphs A through E. Paragraphs A through D 

establish particulate matter limits and an opacity standard that are similar to those established in many 

of Arizona performance standards in Article 7. Paragraph E addresses reference methods and includes a 

reference to “Method A1,” which constitutes section 7 of the Arizona Testing Manual, which was 

included in ADEQ’s May 16, 2014 supplement. Approval of R18-2-715, as submitted, would supersede 

SIP rule 7-1-3.6 (for copper smelters outside of Gila, Maricopa, Pima, Pinal and Santa Cruz counties) and 

FIP rule 40 CFR 52.126(b) (for copper smelters within those counties). See EPA’s proposed disapproval of 

R9-3-515(B)(“Particulate emission limitations”) at 51 FR 25900 (July 17, 1986). Two primary copper 

smelters remain in operations in Arizona and both are located in Gila County. With respect to the 

remaining smelters, the particulate matter limits in R18-2-715 are not as stringent as the corresponding 

limits in FIP rule 40 CFR 52.126(b), and thus a rationale for approval of paragraphs A through E and the 

rescission of the FIP is not yet justified. Recommend deferral of paragraphs (A) through (E) pending 

further review and consider action on test method A1 (in section 7) of the Arizona Testing Manual when 

taking action on the paragraph E.

R18-2-716 (“Standard of Performance for Existing Coal Preparation Plants”)

Amended to remove the reference to Appendix 10. Also, minor technical and grammatical 

changes have been made to improve the rules’ clarity, conciseness, and understandability and to 

conform to the formatting style required by the Arizona Secretary of State.
40

Relative to existing SIP rule R9-3-516, R18-2-716 would delete the 40% opacity standard 

contained in the earlier, approved version of the rule, but such deletion is acceptable because opacity 

standards not otherwise specified in Article 7 rules are now set forth in R18-2-702 (“General 

Provisions”), which EPA approved on August 24, 2004 at 69 FR 51952. R18-2-716 references R18-2-604

through R18-2-607 for requirements related to fugitive emissions. R18-2-604 through R18-2-607 were 

submitted to EPA in July 1998 and are evaluated herein. Lastly, relative to the existing SIP rule R9-3-516, 

R18-2-716 does not include the more stringent particulate matter emissions limits for subject sources 

located in Gila, Maricopa, Pima, Pinal, and Santa Cruz counties that are required under existing SIP rule 

R9-3-516. Recommend deferral of this rule pending further review of the deletion of the tighter 

emissions and opacity limits for subject sources in Gila, Maricopa, Pima, Pinal, or Santa Cruz counties to 

determine compliance with CAA sections 110(l) and 193.

R18-2-717 (“Standards of Performance for Steel Plants: Existing Electric Arc Furnaces (EAF)”)

Amended to remove the reference to Appendix 10. Also, minor technical and grammatical 

changes have been made to improve the rules’ clarity, conciseness, and understandability and to 

conform to the formatting style required by the Arizona Secretary of State. Relative to existing SIP rule 

R9-3-517, R18-2-717 does not include the more stringent particulate matter emissions limits for subject 

sources located in Gila, Maricopa, Pima, Pinal, and Santa Cruz counties that are required under existing 

SIP rule R9-3-517. Recommend deferral of this rule pending further review of the deletion of the tighter 

emissions and opacity limits for subject sources in Gila, Maricopa, Pima, Pinal, or Santa Cruz counties to 

determine compliance with CAA sections 110(l) and 193.

R9-3-518 (“Standards of Performance for Existing Kraft Pulp Mills”)(Rescission)

Repealed because there are no longer any operating Kraft pulp mills in Arizona. Submittal of the 

repealed rule is interpreted as a request for rescission of the corresponding existing SIP rule, R9-3-518. 

Such deletion without replacement would be acceptable given that no such pulp mills operate within 

the state and any new kraft pulp mills that locate to Arizona would be required to apply for a permit 

under New Source Review or PSD rules and may be subject to NSPS as well. Recommend rescission of 

R9-3-518 from the SIP.

R18-2-719 (“Standards of Performance for Existing Stationary Rotating Machinery”)

Amended to remove the reference to Appendix 10. Also, minor technical and grammatical 

changes have been made to improve the rules’ clarity, conciseness, and understandability and to 

conform to the formatting style required by the Arizona Secretary of State. R18-2-719 relies on terms 

“low sulfur oil” and “high sulfur oil” that are no longer defined in the rule (as they were in R9-3-519). 

These terms are now defined along with many other terms in R18-2-701 (“Definitions”), which was 

submitted for approval as part of the SIP and is evaluated herein. Recommend approval.

R18-2-720 (“Standards of Performance for Existing Lime Manufacturing Plants”)

Amended to remove the reference to Appendix 10. Also, minor technical and grammatical 

changes have been made to improve the rules’ clarity, conciseness, and understandability and to 

conform to the formatting style required by the Arizona Secretary of State. R18-2-720 references R18-2-

604 through R18-2-607 for requirements related to fugitive emissions. R18-2-604 through R18-2-607 

were submitted to EPA in July 1998 and are evaluated herein. Also, relative to existing SIP rule R9-3-520, 

R18-2-720 does not include the more stringent particulate matter emissions limits for subject sources 

located in Gila, Maricopa, Pima, Pinal, and Santa Cruz counties that are required under existing SIP rule 

R9-3-520. However, ADEQ indicates that there are only two existing lime manufacturing facilities subject 
41

to R18-2-720,3 neither of which is located in one of the counties (Gila, Maricopa, Pima, Pinal, and Santa 

Cruz counties) subject to the more stringent limits in existing SIP rule R9-3-520. Any new lime 

manufacturing facility in those counties would be subject to NSPS or MACT and thus would be subject to 

more stringent requirements than in R9-3-520. Thus, approval of R18-2-720 would not result in interfere 

with attainment and maintenance of any NAAQS under CAA section 110(l) nor would it require 

equivalent emissions reductions under CAA section 193. Recommend approval.

R18-2-721 (“Standards of Performance for Existing Nonferrous Metals Industry Sources”)

Amended to remove the reference to Appendix 10. Also, minor technical and grammatical 

changes have been made to improve the rules’ clarity, conciseness, and understandability and to 

conform to the formatting style required by the Arizona Secretary of State. Relative to existing SIP rule 

R9-3-521, R18-2-721 would delete the 40% opacity standard contained in the earlier, approved version 

of the rule, but such deletion is acceptable because opacity standards not otherwise specified in Article 

7 rules are now set forth in R18-2-702 (“General Provisions”), which EPA approved on August 24, 2004 

at 69 FR 51952. Also, relative to the existing SIP rule R9-3-521, R18-2-721 does not include the more 

stringent particulate matter emissions limits for subject sources located in Gila, Maricopa, Pima, Pinal, 

and Santa Cruz counties that are required under existing SIP rule R9-3-521. Recommend deferral of this 

rule pending further review of the deletion of the tighter emissions and opacity limits for subject 

sources in Gila, Maricopa, Pima, Pinal, or Santa Cruz counties to determine compliance with CAA 

sections 110(l) and 193.

R18-2-722 (“Standards of Performance for Existing Gravel or Crushed Stone Processing Plants”)

Amended to remove the reference to Appendix 10. Also, minor technical and grammatical 

changes have been made to improve the rules’ clarity, conciseness, and understandability and to 

conform to the formatting style required by the Arizona Secretary of State. Relative to existing SIP rule 

R9-3-522, R18-2-722 would delete the 40% opacity standard contained in the earlier, approved version 

of the rule, but such deletion is acceptable because opacity standards not otherwise specified in Article 

7 rules are now set forth in R18-2-702 (“General Provisions”), which EPA approved on August 24, 2004 

at 69 FR 51952. R18-2-722 references R18-2-604 through R18-2-607 for requirements related to fugitive 

dust. R18-2-604 through R18-2-607 were submitted to EPA in July 1998 and are evaluated herein. Lastly, 

relative to the existing SIP rule R9-3-522, R18-2-722 does not include the more stringent particulate 

matter emissions limits for subject sources located in Gila, Maricopa, Pima, Pinal, and Santa Cruz 

counties that are required under existing SIP rule R9-3-522. Recommend deferral of this rule pending 

further review of the deletion of the tighter emissions and opacity limits for subject sources in Gila, 

Maricopa, Pima, Pinal, or Santa Cruz counties to determine compliance with CAA sections 110(l) and 

193.

R18-2-723 (“Standards of Performance for Existing Concrete Batch Plants”)

This rule was included in ADEQ’s May 16, 2014 supplement, and other than renumbering, there 

are no substantive changes evident between R18-2-723 and the existing SIP rule (R9-3-523). The 

submitted rule cites R18-2-604 through R18-2-607, which were also submitted to EPA and evaluated 

herein. Recommend approval.

R18-2-724 (“Standards of Performance for Fossil-fuel fired Industrial and Commercial Equipment”)

Amended to remove the reference to Appendix 10. Also, minor technical and grammatical 

changes have been made to improve the rules’ clarity, conciseness, and understandability and to 

 

3

 See email from Diane Arnst, ADEQ, to Jerry Wamsley, EPA, dated September 28, 2011.
42

conform to the formatting style required by the Arizona Secretary of State. R18-2-724 relies on terms 

“low sulfur oil” and “high sulfur oil” that are no longer defined in the rule (as they were in R9-3-524). 

These terms are now defined along with many other terms in R18-2-701 (“Definitions”), which has been 

submitted to EPA for approval as part of the SIP and is evaluated herein. Recommend approval. 

R18-2-726 (“Standards of Performance for Sandblasting Operations”)

Other than renumbering, no substantive changes are evident between the 1998 submitted rule, 

as resubmitted in ADEQ’s May 16, 2014 supplement, and the existing SIP rule (R9-3-526). Recommend 

approval.

R18-2-728 (“Standards of Performance for Existing Ammonium Sulfide Manufacturing Plants”)

The rule was renumbered and included in ADEQ’s May 16, 2014 supplement. A comparison of 

R18-2-728 with the existing SIP version of the rule shows that no substantive changes in the rule have 

been adopted. Recommend approval.

R18-2-729 (“Standards of Performance for Cotton Gins”)

R18-2-729 references R18-2-604 through R18-2-607 for requirements related to fugitive 

emissions. R18-2-604 through R18-2-607 were submitted to EPA in July 1998, and as currently codified 

in ADEQ’s May 16, 2014 supplement, and are evaluated herein. Recommend approval.

R18-2-730 (“Standards of Performance for Unclassified Sources”)

Amended to remove the reference to Appendix 10. Also, minor technical and grammatical 

changes have been made to improve the rules’ clarity, conciseness, and understandability and to 

conform to the formatting style required by the Arizona Secretary of State. Recommend approval.

R18-2-732 (“Standards of Performance for Existing Hospital/Medical/Infectious Waste Incinerators”)

Amended to delete the reference to the old ADEQ address. Hospital incinerators were formerly 

regulated under R9-3-504 (re-numbered R18-2-704), but are now regulated separately under R18-2-732.

R18-2-732 refers to two tables that were also included in the submittal package at the end of AAC, title 

18, chapter 2, article 7. Recommend approval.

Appendix 9 (“Monitoring Requirements”)

The only rule that relies on appendix 9 is R18-2-713 (“Standards of Performance for Existing Iron 

and Steel Plants”). Although R18-2-713 was previously approved into the SIP as R9-3-513 and R9-3-513 

also relies on “appendix 9,” EPA has yet to approve appendix 9 as part of the SIP, and thus appendix 9, 

which was included in ADEQ’s May 16, 2014 supplement, would be new to the SIP. R18-2-713 is 

recommended herein for deferral based on CAA section 110(l) considerations and thus deferral of 

appendix 9 is also recommended pending further consideration of R18-2-713. 

Appendix 11 (“Allowable Particulate Emissions Computations”)(Rescission)

Repealed as unnecessary because the actual values must be calculated using the equation 

included in the rules. Approval of the repeal of appendix 11 would provide EPA with the basis to delete 

existing SIP appendix 11 without replacement from the Arizona SIP. Such deletion without replacement 

would be acceptable given that appendix 11 contains a plot of emissions limits based on formulas 

contained in the substantive rules that was intended for reference purposes only but not as defining the 

SIP limit. Rather, the formula provides the SIP limit. Thus, appendix 11 is not necessary to be retained in 

the SIP. Recommend approval of rescission request.
43

SUMMARY OF RECOMMENDATIONS

With the following exceptions, the new or amended statutory provisions and rules and rule 

rescissions evaluated herein meet all of the applicable CAA requirements and should be approved. The 

following paragraphs contain recommendations for clarification or further revisions of the rules for 

which approval is recommended, and a list of rules that are recommended for deferral pending further 

documentation.

Recommendations for Changes to the Rules:

 ADEQ should clarify that the definition of “excess emissions” in R18-2-101(50) does not preclude 

use of credible evidence in establishing whether an emissions standard has been violated. See 

40 CFR 51.212. Clarification could be made in the form of written assurance to EPA or through 

changes in the definition itself.

 ADEQ should revise the definition in R18-2-101(51) (“Federal applicable requirement”) to match 

the corresponding definition in part 70. 

 Under 40 CFR 50.4, the annual and 24-hour standard remain applicable until one year after the 

effective date; and thus, R18-2-202 revokes the annual and 24-hour primary SO2 standards one 

year too soon. ADEQ should conform the rule to revocation schedule set forth in 40 CFR 50.4 

and re-submit R18-2-202 as a revision to the Arizona SIP.

 R18-2-210 (“Attainment, Nonattainment, and Unclassifiable Area Designations”). This rule 

incorporates by reference the area designations as of July 1, 2011, but as such, does not include 

a number of new designations and redesignations in Arizona. ADEQ should update R18-2-210 to 

reflect current designations in the State of Arizona and re-submit R18-2-210 as a revision to the 

Arizona SIP. 

 ADEQ should revise R18-2-701(41) to refer to R18-2-702(F) instead of R18-2-702(E), and resubmit R18-2-701 as a revision to the Arizona SIP. 

Defer Action Depending Additional Analysis:

R18-2-705

R18-2-708

R18-2-711

R18-2-712

R18-2-713

R18-2-715, Paragraphs (A) through (E)

R18-2-716

R18-2-717

R18-2-721

R18-2-722

Appendix 9

Arizona Testing Manual for Air Pollutant Emissions, Revision F, March 1992, Section 7.